SMB122 SUMMIT Microelectronics, Inc:, SMB122 Datasheet
SMB122
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SMB122 Summary of contents
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... I C/SMBus Pushbutton Power Figure 1 – Applications block diagram featuring the SMB122/X eight-channel, programmable DC/DC converters. This integrated power supply and battery manager provides precision regulation, monitoring, cascade sequencing, output margining and battery charging. © SUMMIT Microelectronics, Inc. 2006 INTRODUCTION 2 C interface ...
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... Supplies may also be individually powered on/off through an I command or by assertion of one or two (for SMB122X) general purpose enable pins. Cascade sequencing, unlike time based sequencing, uses feedback to ensure that each output is valid before the next channel is enabled ...
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... Rcsb Battery Pack +3.0V to +4.2V 1-cell Li-Ion +1.5V to 3.75 @ 50mA -0.5V to -35V (-15V typ) @ 200mA Figure 2 – Typical application schematic of the SMB122/SMB122X (QFN-64) showing external circuitry necessary to configure the output channels as: step-up, LDO, step-down, inverting and battery charger. Summit Microelectronics, Inc SMB122 (SMB122X) VDD VIN7 VDDP ...
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... VDC (+4.5V to +6V) Rcsb Battery Pack +3.0V to +4.2V 1-cell Li-Ion +1.5V to 3.75 @ 50mA Vin to 36V@ 20mA Figure 3 – Typical application schematic of the SMB122/122X (QFN-64) showing external circuitry necessary to configure the output channels as: step-up, LDO, step-down, LED driver and battery charger. Summit Microelectronics, Inc SMB122 (SMB122X) VDD VIN7 ...
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... Output Buck converter low-side drive. Connect to NFET gate SMB122: Not connected NC SMB122X: Enable input. The SYS_EN pin is an active high Input programmable input used to enable (disable) selected supplies. When unused this pin should be tied to a solid logic level. DC Input Valid. Active high open drain indicates presence of DC ...
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... Input current sense resistor. Do not attach to battery node at any other point. Shutdown. Active high, disables all functions of the SMB122 for low power operation. When low the SMB122 is in low current mode. Input When voltage is present on the DOCK_DC input the part will exit shutdown state ...
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... Fault Interrupt. Latched, open drain active low output. Flag for all Output fault conditions (multiplexed) Oscillator Synchronization. Used for synchronization with external Input clock (range: 500kHz Microelectronics for more information. Power Ground. Internally connect to under package pad. Connect Ground to isolated PCB ground plane/flood 7 SMB122/SMB122X to 1MHz). Please contact Summit ...
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... COMP6 17 Summit Microelectronics, Inc SMB122 64-pin QFN Top view SMB122 (SMB122X) 9mm x 9mm QFN-64 (Top View SMB122/SMB122X BSENSE 47 BFETDRV 46 PCHSEQ2 45 COMP2 44 CSL2 43 CSH2 42 FB2 41 DRVL2 40 DRVL1 39 FB1 38 CSL1 37 CSH1 ...
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... All regulators and monitors enabled – no load 4.2V BATT All regulators disabled, monitors active 4.2V BATT All regulators and monitors disabled, Note 4 All logic derived from this voltage, no load T = 0°C to +70° -40°C to +85°C 9 SMB122/SMB122X ) JA Min Typ Max Unit +2.7 +6.0 V +2.7 +6.0 V 2.3 2 ...
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... BATT LOAD Programmable in 4mV steps V =0.836V 0.1Ω, I =350mA SENSE LOAD OL-SEQ Output High Output Low Programmable 1.0, 1.1, 1.2, 1.5V Clamp threshold 1.0 and 1.5V Maximum (clamp on) Minimum, PWM mode 10 SMB122/SMB122X Min Typ Max Unit -35 -0.5 V 0. µA 850 890 146 umho ± ...
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... OUT T = 0°C to +70°C Programmable in 4mV steps I = 500mA LOAD I = 500mA LOAD Output High Output Low Programmable 1.0, 1.1, 1.2, 1.5V Clamp threshold 1.0 and 1.5V Maximum 4.2V BATT Minimum, PWM mode 4.2V BATT 11 SMB122/SMB122X +0.5 VIN V ± ± 160 umho ±20 µA 1.2 Ω 320 mΩ Ω ...
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... LOAD Programmable in 4mV steps FB[4] Pin 0.660V, FB Note 2 Output High Output Low Output High Output Low Maximum 4.2V BATT Minimum, PWM mode 4.2V BATT Maximum 4.2V BATT Minimum, PWM mode 4.2V BATT 12 SMB122/SMB122X +0.5 +VIN V +VIN + ±20 µA Ω 15 Ω 15 Ω Ω ...
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... CHG 20mV steps V = 4.2V FLT VBATT falling FLT FLT_HYST R =0.1Ω, 15mA steps CSB I = 100mA TERM steps steps Adjustable (3 setpoints) Adjustable (3 setpoints) Programmable in 0.2V steps V =4.6V PDDCTH 13 SMB122/SMB122X Min Typ Max Unit +1.5 +3.75 V ±0.5 -2.5 +2 mV/V mV 150 mV 5.0 V 2.500 3 ...
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... CSIR code will result in inaccuracies exceeding those specified above. Note 3: The SMB122 and SMB122X devices are not intended to function as a battery pack protector. Battery packs used in conjunction with this device need to provide adequate internal protection and to comply with the corresponding battery pack specifications. ...
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... When PWR_EN is programmed as power on pin. Timeout begins after latch is cleared. Timeout begins after fault conditions cleared. Period for which fault must persist before fault triggered actions are taken. Present on all Buck, Boost, and inverting supplies. 15 SMB122/SMB122X Min Typ Max 1.5 12.5 sequence ...
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... AC OPERATING CHARACTERISTICS (CONTINUED) (Over commercial operating conditions, unless otherwise noted. All voltages are relative to GND.) Symbol Parameter Programmable slew rate SR REF reference Summit Microelectronics, Inc Notes Adjustable slew rate factor proportional to output slew rate. 16 SMB122/SMB122X Min Typ Max Unit 400 200 100 66.7 V ...
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... Before new transmission - Note 5 SCL low to valid SDA (cycle n) SCL low (cycle n+1) to SDA change Note 5 Note 5 Noise suppression Configuration registers Memory array HIGH LOW HD:DAT HD:STA SMB122/SMB122X 100kHz Min Typ 0 4.7 4.0 4.7 4.7 4.0 4.7 0.2 0.2 250 0 100 t WR (For Write Operation Only) t BUF t t SU:DAT ...
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... Current (Amps) Buck 1.2V 100 0.8 0 0.2 0.4 Current (Amps) Buck 2.5V 100 0.8 0 0.2 0.4 Current (Amps) 18 SMB122/SMB122X Channel 4 Boost 15V 100 5.0V 75 4.2V 3.8V 70 3.6V 3.3V 65 3.0V 60 0.3 0.4 0 0.05 Current (AMPS) Channel 4 Buck 3.3V 100 5.0V 4.2V Buck 3.3V 70 3.8V 3.3V 3. 0.5 1 0.6 0.8 Current (AMPS) Buck 3 ...
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... Figure 5: Light load inductor current in constant frequency mode (PWM). Time/Horizontal division = 1 µ (50mA/Div) = 1.5V (Ch 7) converter output (Green trace) Figure 7: SMB122/SMB122X Sequence-On Waveforms Time/Horizontal division = 100mS Ch 1(2V/Div) = 3.3V (Ch 4) converter output (Yellow trace (5V/Div) = 12V (Ch 2) converter output (Blue trace (2V/Div) = 1.8V (Ch 6) converter output (Purple trace (5V/Div ...
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... Figure 11: Pulse skipping on LSDRV for light load PFM operation Time/Horizontal division = 4 µ 1(2V/Div) = LSDRV output (Yellow trace) Summit Microelectronics, Inc SMB122/SMB122X Figure 10: Pulse skipping on LSDRV pin while in PFM mode of operation. Switching frequency is proportional to load. Time/Horizontal division = 200 µ 1(2V/Div) = LSDRV output (Yellow trace (50mA/Div) = 150mA load step (Green trace) Figure 12: Forced PWM operation ...
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... TIMING DIAGRAMS: BATTERY MONITORING Figure 13 – Battery monitoring timing diagram. Summit Microelectronics, Inc SMB122/SMB122X 21 ...
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... APPLICATIONS INFORMATION DEVICE OPERATION POWER SUPPLY The SMB122 and SMB122X can be powered from an input voltage between +2.7 and +6.0 volts applied between the VBATT pin and ground. The SMB122 and SMB122X are optimized for use with a rechargeable single cell Lithium ion battery, but may also be powered from a rectified AC adaptor or three AA batteries ...
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... When a power-off command is issued the SMB122 and SMB122X will set the sequence position counter to the last sequence position and disable that channel without soft-start control; once off, the power off delay for the ...
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... Figure 14 – Power-on sequencing flow chart. Summit Microelectronics, Inc PWREN PIN I2C POWER ASSERTED ON COMMAND BEGIN SEQUENCING SEQUENCE POSITION 1 CURRENT SEQUENCE POSITION POWER ON DELAY CHANNEL CHANNEL NOT ENABLED ENABLED SOFT-START MONITOR ENABLE HIGH VOUT=>UV 24 SMB122/SMB122X NEXT SEQUENCE POSITION WAIT FOR ENABLE ENABLE LOW SOFT-START ...
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... The DOCK_DC pin is a power input pin that can be used to power the SMB122 or SMB122X and also indicate the presence, and level supplemental input like that supplied by a docking station or AC wall adaptor ...
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... C write command. A status register is provided to indicate the current margin state of each channel. A seven level margining option is available for channels 4 and 5 of the SMB122X device. When enabled, seven level margining allows channels 4 and dynamically modified to one of seven pre-determined voltage levels. When seven level margining is enabled channels and 7 loose the margin high and margin low settings ...
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... CHARGE TERMINATION TIMERS The There are two timers on the SMB122 and SMB122X used to disable battery charging. The first timer is used to limit the allowable pre-charge duration. This timer begins when trickle charging is completed and ends when fast charging begins ...
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... Figure 16: Battery charging algorithm Summit Microelectronics, Inc t(precharge) 2500 sec 20000 sec 28 SMB122/SMB122X t(charge ...
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... Vbatt<Vfloat YES Fast Charge Mode Regulate Current to Ichg YES NO t(charge) expired? YES NO Vbat t<Vprechg? NO Terminate Charge Iout < I(term)? YES Standby Mode 29 SMB122/SMB122X Precharge Mode Regulate Current to Iprechg Vbatt < Vprechg? NO YES t(precharge) expired? YES Battery Fault Terminate Charge NO Vbatt < Vfloat - 100mV? ...
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... APPLICATIONS INFORMATION (CONTINUED) BUCK CONVERTERS The SMB122 AND SMB122X has three synchronous step down Buck converters with integrated p-channel MOSFETS and a driver for an external NFET, see Figure 18 buck converter the maximum output voltage is the input supply voltage on the VIN pin. ...
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... Figure 19: Boost Converter Summit Microelectronics, Inc INVERTING BUCK BOOST The SMB122 and SMB122X has one voltage mode inverting Buck Boost output. The output of this converter is negative, and the magnitude can be either greater or less than the supply voltage. The Buck-Boost ...
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... APPLICATIONS INFORMATION (CONTINUED) BOOST OR BUCK CONTROLLER The SMB122 and SMB122X have one voltage mode output that can be configured as either a Boost or a Buck converter, but not both; see Figures 21 and 22. When configured as a Buck the output voltage can only be less than or equal to the input voltage. When a ...
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... In addition, the DC bias voltage rating can reduce the measured capacitance by as much as 50% when the voltage is at half of the max rating, make sure to look at the DC bias de-rating curves when selecting a capacitor. 33 SMB122/SMB122X ...
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... GS GS Boost Compensation: Summit provides a design tool to called Summit Power Designer” compensation values for a design or allow the system to be customized for a particular application. The power designer http://www.summitmicro.com/prod_select/xls/SummitPo werDesigner_Install.zip can ON 34 SMB122/SMB122X V − − O NFET : − O PFET : ...
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... VBATT VDDCAP R65 10K C2 C1 1uF 0.1uF VIN VIN4 C40 C41 C10 10uF 0.1uF 10uF Figure 23 – Applications schematic shown the SMB122 programmable power manager. Summit Microelectronics, Inc C46 10uF R44 3 R43 3 C37 C38 10uF 0.1uF C39 0.1uF R41 3 R40 ...
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... R5, R6, R7, R8, R9, R10, R53, R63 3 R11, R12, R34 1 R13 9 R14, R19, R22, R39, R40, R41, R43, R44, R69 5 R15, R16, R17, R50, R64 1 R23 2 R24, R47 2 R25, R48 3 R30, R35, R49 1 R31 3 R32, R38, R46 1 R36 1 R37 1 R45 1 R54 1 R66 36 SMB122/SMB122X Reference Designator ...
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... SDA 2 1 SCL 2 C serial bus connections to program the SMB122 and SMB122X. 37 SMB122/SMB122X 2 C serial bus format so that it can be directly Top view of straight 0.1" x 0.1 closed-side connector. SMX3200/SMX301 interface cable connector. Pin 9, 3.3V Pin 10, Reserved Pin 8, Reserved Pin 7, 10V Pin 5, Reserved ...
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... The address pointer for the non-volatile configuration registers and memory registers as well as the volatile command and status registers must be set before data During data can be read from the SMB122 and SMB122X. This is accomplished by issuing a dummy write command, which is a write command that is not followed by a Stop condition. ...
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... A programming Slave Address Table 2 - Address bytes used by the SMB122 and SMB122X. Summit Microelectronics, Inc Dongle (SMX3200) is available from Summit to communicate with the SMB122 and SMB122X. The Dongle connects directly to the parallel port and programs the device through a cable using the I bus protocol ...
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... Figure 26 – Configuration Register Page Write 40 SMB122/SMB122X Data Data ( ...
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... Figure 29 – General Purpose Memory Page Write 41 SMB122/SMB122X Bus Address ...
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... Figure 30 – General Purpose Memory Read 42 SMB122/SMB122X Bus Address ...
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... PACKAGE Summit Microelectronics, Inc SMB122/SMB122X 43 ...
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... L AYYWW Pin 1 Lot tracking code (Summit use) 100% Sn, RoHS compliant Part Number suffix (Customer specific ordering requirements) Drawing not "761" indicates SMB122 default configuration to scale blank indicates SMB122X default configuration Product Tracking Code (Summit use) C nnn L Environmental Attribute L = 100% Sn, RoHS compliant ...