MB3827 Fujitsu Microelectronics, Inc., MB3827 Datasheet
MB3827
Related parts for MB3827
MB3827 Summary of contents
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... In addition the MB3827 features a built-in self-supply power channel (channel 7) providing a wide range of supply voltages, and operates from two dry-cell batteries. This product is ideal for high performance portable devices such as digital still cameras. ...
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... MB3827 PIN ASSIGNMENT OUT7 1 RB7 2 3 GND(O)5,6,7 XENB1-6 4 FB7 5 6 -IN7-1 -IN7 +IN7 DTC7 9 -IN(A OUT(A)6 -IN6 12 FB6 13 14 -IN(C)6 DTC6 15 DTC5 16 2 OUT1 RB1 46 GND(O)1 45 FB1 44 -IN1 43 DTC1-1 42 DTC1-3 41 DTC1-4 40 DTC2 39 -IN2 38 FB2 FB3 37 36 -IN3 35 DTC3 ...
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... Channel 4 dead time control pin. 61 OUT4 O Channel 4 output pin. 19 FB5 O Channel 5 error amplifier output pin. 18 –IN5 I Channel 5 error amplifier inverted input pin –IN(C)5 I Channel 5 short detection comparator input pin. 16 DTC5 I Channel 5 dead time control pin. 62 OUT5 O Channel 5 output pin. MB3827 Descriptions (Continued) 3 ...
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... MB3827 (Continued) Pin No. Symbol I/O 10 –IN(A OUT(A FB6 –IN6 I 14 –IN4(C DTC6 I 63 OUT6 O 5 FB7 O 6 –IN7 IN7 I 7 –IN7 DTC7 I 1 OUT7 O 2 RB7 — — — 27 CTL1- CTL5 I 29 ...
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... Step-up synchronous rectifier side output circuit power supply pin (Channel 1). Output circuit power supply pin (Channel 6). Reference voltage output pin. Triangular wave oscillator regulator output pin. Ground pin. Output circuit ground pin (Channel 1). Output circuit ground pin (Channel 2, 3, 4). Output circuit ground pin (Channel 5, 6, 7). MB3827 5 ...
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... MB3827 BLOCK DIAGRAM • General view FB1 IN1 DTC1-1 DTC1-3 DTC1-4 FB2 IN2 DTC2 FB3 IN3 DTC3 FB4 IN4 DTC4 FB5 IN5 -IN(C)5 DTC5 IN(A)6 OUT(A)6 FB6 IN6 IN(C)6 DTC6 FB7 IN7-1 IN7 IN7-2 DTC7 IN7(C)8 CTL5 CTL6 CS1 VCC(O)1, 2 CH1 Error VB1-1 PWM Amp ...
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... PWM Comp.1-2 Drive 1-2 PWM Comp.1-3 Drive 1-3 VB1-4 PWM (0.02 V) Comp.1-4 Drive 1-4 CH2 PWM Comp.2-1 Drive 2-1 VB2 (0.04 V) PWM Comp.2-2 Drive 2-2 CH3 PWM Comp.3 Drive 3 MB3827 53 VCC(O) OUT1-1 54 VSS(O) OUT1-2 47 RB1 49 OUT1-3 51 VG(O)1 48 OUT1-4 46 GND(O)1 55 OUT2-1 57 OUT2-2 58 VCC(O) OUT3 59 VSS(O) ...
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... MB3827 • Enlarged view FB4 Error Amp.4 IN4 21 1.26 V SCP Comp.4 1 DTC4 FB5 19 Error Amp.5 IN5 18 1.26 V SCP Comp.5 -IN(C DTC5 INV Amp.6 IN(A OUT(A)6 FB6 13 Error Amp.6 12 IN6 1.26 V SCP Comp.6 IN(C)6 14 1.26 V DTC6 15 8 CH4 PWM Comp.4 Drive ...
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... Buff 30 CS1 CH7 48.5 k PWM Comp.7 0.77 V Drive 7 30.1 k SCP Comp.7 VSCP 0.9 V SCP Comp.8 1.26 V Power Comp. 0.6 V 1.8 V 1.1 V 1.8 V 1.1 V 0.8 V 0.3 V UVLO OSC SCP Ref ON/OFF 2 VREF CT CSCP MB3827 1 OUT7 2 RB7 3 GND(O) XENB1-6 26 VCC Power 27 CTL1-4, 7 CTL 25 GND 9 ...
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... MB3827 ABSOLUTE MAXIMUM RAGINGS Parameter Symbol Power supply voltage Output current Peak output current Power dissipation Storage temperature * : The packages are mounted on the dual-sided epoxy board (10 cm WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. ...
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... — CSCP 52,50,49,48 100 pF 55,57,60,61, OSC 62,63 52,50,49,48, f 55,57,60,61 62,63 52,50,49,48, f –30°C to +85°C 55,57,60,61, dT 62,63 MB3827 = 4 Value Unit Min. Typ. Max. 2.475 2.5 2.525 V — 0.5* — % –10 — –10 — –20 –5 – ...
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... MB3827 (Continued) Parameter Threshold voltage V temperature stability T Input bias current Voltage gain Frequency bandwidth Output voltage Output source current Output sink current Input offset voltage V temperature stability T Input bias current Common mode input voltage rage Voltage gain Frequency bandwidth Output voltage ...
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... TH 60,61 44,39,36 62,63 — 17,14,23 IN( — Duty cycle = Duty cycle = 100 % T100 MB3827 = 4 Value Unit Min. Typ. Max. – –120 –30 — 100 — dB — 1.0* — MHz 2.2 2.4 — ...
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... MB3827 (Continued) Parameter Threshold voltage Threshold voltage Threshold voltage Threshold voltage Threshold voltage Threshold voltage *: Standard design value. 14 ( Pin No. Conditions Symbol V 50 Duty cycle = 100 % T100 V 50 Duty cycle = Duty cycle = Duty cycle = 100 % T100 ...
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... O 61,62,63 I 50,57 Duty 5 %, OUT= 0V SOURCE I 50,57 Duty 5 %, OUT= 4V SINK V 50, 50, 24k , OUT= 0.7V SOURCE Duty 5 %, OUT= 0.7V SINK MB3827 = 4 Value Unit Min. Typ. Max. 0.2 0.3 — V — 0.77 0. 1.0 1.1 — V — 1.8 1.9 V –1.0 –0.3 — ...
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... MB3827 (Continued) Parameter Output source current Output sink current Output voltage Output source current Output sink current CTL input condition Input current CTL input condition Input current Standby current Power supply current * Standard design value. 16 ( Pin No. Conditions Symbol I 48 ...
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... Power supply voltage V CTL6 100 Control current vs. control voltage 500 VCC 9 V 400 IREF 0 mA 300 200 100 Control voltage V MB3827 CTL VCC IREF ( VCC 9 V CTL1 4, 7 CTL5 CTL6 6 8 ...
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... MB3827 (Continued) Triangular wave upper and lower limit voltage vs. timing capacitor 1 0.8 0.6 0.4 0 100 Timing capacitor C Triangular wave oscillator frequency vs. timing capacitor 10000 1000 100 10 10 100 Timing capacitor C Triangular wave oscillator frequency vs. ambient temperature 560 VCC 9 V CTL1 4, 7 540 ...
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... 180 CC 90 4 1.4 V 180 180 CC 90 4 180 100 Ambient temperature MB3827 9 V 240 OUT 1. 240 OUT 8 1. ...
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... MB3827 FUNCTIONAL DESCRIPTION 1. Switching Regulator Function (1) Reference voltage circuit The reference voltage circuit generates a temperature-compensated reference voltage ( : = 2.50 V) using the voltage supplied from the power supply terminal (pin 26). This voltage is used as the reference voltage for the internal circuits of the IC. The reference voltage 1mA can also be supplied to an external device from the VREF terminal (pin 24) ...
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... Channel on/off setting conditions CTL6 Power CH7 CH1 OFF (standby state) X OFF pin, the OUT1-3 and OUT1-4 pins are held at “L” level. REF connected to the CSCP terminal (pin 31) starts SCP MB3827 CH5 CH6 OFF ON ON OFF OFF ON 21 ...
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... MB3827 4. Soft Start Operation (1) Operating Description • Simultaneous “H” level of CTL1-4, 7 terminal, and CTL5 terminal, CTL6 terminal When CTL1-4, 7 terminal (pin 27) , and CTL5 terminal (pin 28) , CTL6 terminal (pin 29) are started at the same time, the capacitor (C ) connected to DTC7 terminal (pin 9) starts charging. When the DTC7 terminal (pin 9) DTC voltage reaches 0 ...
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... Channel soft start interval (5) to (6) : Channel 5 (channel 6) soft start interval (5)’ to (6)’: Channel 5 (channel 6) soft start interval (wave form) as CTL5 (CTL6) goes “L” to “H” during a soft start on channels 1-4. 1.26 V (1) (2) (3) (4) (5)’ (6)’ MB3827 ) connected to the CS1 (5) (6) 23 ...
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... MB3827 (2) Setting Methods • Channel 7 soft start interval Before CTL1-4, 7 are ON: Vin is applied along path (A) below and charges C After CTL1-4, 7 are ON: Along path (B), C and with the fall of V-IN7-1, channel 7 is activated with a soft start. Note : The short detection function is suspended while VDTC is below 0.6V. ...
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... Note : The short detection function operates during soft starts on channel 1 to channel 6. METHOD OF SETTING THE OSCILLATOR FREQUENCY SETTING The oscillator frequency can be set by the timing resistor R capacitor C connected to the CT pin (pin 34). T Oscillator frequency: 900000 f [kHz OSC C [pF] T connected to the RT pin (pin 33), and the timing MB3827 25 ...
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... MB3827 METHODS OF SETTING THE OUTPUT VOLTAGE 1. Channel FB1 R1 IN1 R2 2. Channel IN5 Error Amp. 14 1.26 V SCP Comp. 1 Error Amp.5 18 1.26 V SCP Comp.5 17 1. (R1 R2 1.26 V ( ...
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... Channel ( OUT ( IN6 V V INV IN (A) 6 OUT ( Amp OUT (A) 6 IN6 Error Amp.6 1.26 V MB3827 ...
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... MB3827 SAMPLE POWER SUPPLY USING SELF-POWER SUPPLY (Channel 7) The MB3827 has a built-in self-supply channel (channel 7), capable of supplying the IC with power through transformer winding, with low input voltage (V power supply using the transformer. FB7 5 6 IN7 IN7 10 k Voffset 1.6 V IN7 Note: The following settings are shown in “ ...
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... Output current waveform 0 Output current [ 0.6V 80I Source current setting 33 Output sourrce current I Sink current 70 k setting 33 Output source current (peak) Output source current Output sink current (peak) t MB3827 VCC (O) External NPN transistor OUT Output sink current 0. GND (O) 29 ...
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... MB3827 METHOD OF SETTING TIME CONSTANT FOR TIMER-LATCH SHORT PROTECTION CIRCUIT The short detection comparator (SCP comparator) in each of the channels constantly compares the error amplifier output level to the reference voltage and the IN(C)8 terminal (pin 23). While the switching regulator load conditions are stable on all channels, or when the voltage level at the IN(C)8 pin is higher than the reference voltage, LOG_SCP output remains at “ ...
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... When not using the soft start function on channels the CS1-6 terminal (pin 30)should be left open. When not using the soft start function on channel 7, the DTC7 terminal (pin 9) should be left open. When no soft start time is set CS1 6 31 CSCP “Open” 30 “Open” 9 DTC7 MB3827 31 ...
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... MB3827 METHOD OF SETTING THE DEAD TIME When setting step-up/step-down switching, Zeta type, or fly-back type step-up or inverter output, the output transistor at start- full-on (ON duty cycle = 100%) state. To prevent this, the DTC voltage from the DTC1- 1 terminal (pin 43) to the DTC6 terminal (pin 15) voltage is determined from the VREF voltage, as shown in following figure , so that the output transistor dead time (the maximum value of the ON interval) can be set easily ...
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... When not using the XENB1-6 pin PROCESSING WHEN NOT USING THE CHANNEL 6 INV AMP. When the channel 6 INV amplifier is not in use, the -IN(A)6 terminal (pin 10), and OUT(A)6 terminal (pin 11) should be shorted using the shortest available connection. When not using the channel 6 INV Amp. 4 XNB1 6 10 IN(A)6 11 OUT(A)6 MB3827 33 ...
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... MB3827 APPLICATION EXAMPLE • General view FMMT717: ZETEX plc. FMMT617: ZETEX plc. CPH3403: SANYO Electric Co., Ltd. U1FWJ44N:TOSHIBA CORPORATION MA796: Matsushita Electronic Components Co., Ltd. 2SD1621: SANYO Electric Co., Ltd. RB491D: ROHM CO.LTD 34 0 FB1 VCC(O)1, 2 FMMT717 45 CH1 53 Error VB1-1 PWM Amp.1 (0 ...
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... VB2 (0.04 V) PWM 3300 pF Comp.2-2 OUT2-2 Drive 57 2-2 58 CH3 VCC(O) PWM 3, 4 Comp.3 91 OUT3 Drive VSS( MB3827 Vo1 ( U1FWJ44N FMMT717 22 H CPH3403 U1FWJ44N RL1 50 3300 pF FMMT617 4.7 F CPH3403 100 U1FWJ44N Vo2 ( 4.7 F FMMT717 U1FWJ44N RL2 50 4 ...
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... MB3827 • Enlarged view FB4 20 Error Amp.4 21 VIN IN4 (3 1.26 V SCP Comp.4 1 DTC4 0.1 F 150 k FB5 19 Error 1 K Amp IN5 15 k 1.26 V SCP Comp.5 -IN(C DTC5 INV Amp.6 IN(A OUT(A ...
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... UVLO Power CTL1- ON/OFF OSC SCP Ref CTL 2 CSCP VREF GND 100 pF 0 0.1 F MB3827 VG( VSS( RB491D 4.7 F 4.7 F MA796 100 pF MA796 24 k FMMT617 4.7 F VCC(O) (5 Power/CH1 OFF L: Control by CTL terminal function H: ON (Power/CH1 to 4,7) ...
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... MB3827 REFERENCE DATA Efficiency vs. load current (ch1, step-up/step-down switching method) 100 100 150 200 Load current IL (mA) Efficiency vs. load current (ch2, Zeta Method with Synchronous Rectification) 100 100 150 200 Load current IL (mA output Vin 4 ...
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... After mounting, printed circuit boards should be stored and shipped in conductive bags or containers. • Work platforms, tools, and instruments should be properly grounded. • Working personnel should be grounded with resistance of 250 between body and ground. ORDERING INFORMATION Part number MB3827PFV Package 64-pin plastic LQFP (FPT-64P-M03) MB3827 Remarks 39 ...
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... MB3827 PACKAGE DIMENSION 64-pin Plastic LQFP (FPT-64P-M03) 12.00±0.20(.472±.008)SQ 10.00±0.10(.394±.004) INDEX 64 LEAD No. 1 0.50±0.08 (.020±.003) 1998 FUJITSU LIMITED F64009S-3C Pins width and pins thickness include plating thickness 0.08(.003) 17 "A" 16 +0.08 0.18 0.145±0.055 – ...
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... MB3827 FUJITSU LIMITED All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information and circuit diagrams in this document are presented as examples of semiconductor device applications, and are not intended to be incorporated in devices for actual use. Also, ...