MB3832A Fujitsu Media Devices, MB3832A Datasheet
MB3832A
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MB3832A Summary of contents
Page 1
... The MB3832A is a pulse width modulation (PWM) DC/DC converter IC, incorporating a current detector amplifier and error amplifiers (2 circuits) to control the output voltage and current independently suitable for down- conversion. With an on-chip reference voltage generator, the MB3832A is best suited for use in applications such as lithium- ion battery (1-cell to 3-cell) chargers. FEATURES • ...
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... MB3832A PIN ASSIGNMENT VREF : SYNC : 4 CSCP : 5 FB1 : 6 IN1 : 7 IN1 : 8 INC : 9 INC : 10 2 (TOP VIEW OUT CTL 16 : DTC 15 : FB2 14 : IN2 13 : IN2 12 : COUT 11 : GND (FPT-20P-M03) ...
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... Error amplifier 2 output pin Connection pin for dead time/soft start time setting resistor/capacitor Power supply control input pin “H” level: Active state “L” level: Standby state Power supply pin Totem-pole output pin Connector pin for output sink current setting resistor MB3832A 3 ...
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... MB3832A BLOCK DIAGRAM FB2 15 Error Amp.2 IN2 14 IN2 13 FB1 6 Error Amp.1 IN1 7 8 IN1 DTC 16 SCP Comp 2 CSCP 4 COUT INC INC Current Amp. 25 PWM Comp. DTC Comp. 1.1 V bias S R UVLO OSC Latch 4 2 SYNC RT Out 100 ...
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... Condition Min. — — +IN1, –IN1, +IN2, –IN2 pin +INC, –INC pin CTL pin SYNC pin OUT pin, DC — — 100 — — — –30 MB3832A Rating Unit Max 600 mA 540* mW +125 C Value Unit Typ. Max. ...
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... MB3832A ELECTRICAL CHARACTERISTICS Parameter Output voltage Reference voltage block Input stability (Ref) Load stability Short circuit output current Threshold voltage Under voltage lockout circuit Hysteresis width block (UVLO) Reset voltage Detection voltage Threshold voltage Short detection Input standby block voltage (SCP Comp, ...
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... Duty cycle = Duty cycle = 100 % T100 0.4 V DTC DTC 2.5 V DTC DTC 100 A DTC DTC Dtr /1.56 DTC REF MB3832A ( + Value Unit Min. Typ. Max. –2 — — –2 –1 — A 2.25 2.5 2.75 V 4.5 5.0 5.5 V 2.25 2.5 2 ...
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... MB3832A (Continued) Parameter Output on resistance Output sink current Output voltage Output block (OUT) Control-off output resistance CTL input condition Control block (CTL) Input current Standby current General Power supply current 8 Pin Symbol Condition no – – ...
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... Control current vs. control voltage 500 400 REF 300 200 100 MB3832A load REF CTL load current I (mA) REF characteristics Control voltage V (V) CTL (Continued) ...
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... MB3832A Triangular wave oscillation frequency vs. R resistance characteristics 100 resistance ( ) T Triangular wave oscillation frequency regulation vs. power supply voltage characteristics 3.0 2.0 1 0.0 1.0 2.0 3 Power supply voltage V Triangular wave maximum/minimum voltages vs. triangular wave oscillation frequency 2.5 2.0 1.5 1.0 0 ...
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... Inverting input voltage ( 180 135 2 135 180 10 M Current Amp. 180 135 0 12 135 180 10 M MB3832A 5 V 240 k 7 (14) 6 OUT (15) 8 (13) Err Amp.1 (Err Amp.2) 2 OUT (Continued) 11 ...
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... MB3832A (Continued) 12 Allowable dissipation vs. ambient temperature characteristics 600 540 500 400 300 200 100 Ambient temperature 100 120 ...
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... IC, resulting in breakdown or degradation of the system. The low input voltage malfunction preventive circuit detects the internal reference voltage level according to the supply voltage pin (pin 18) to generate a temperature- CC – 0.9 V”. An arbitrary loop gain can be set by CC amplification of the voltage drop between the two ends of the MB3832A pin. The REF 13 ...
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... MB3832A and turn off the external output transistor to make dead time 100%. The circuit restores voltage supply when the supply voltage reaches its threshold voltage. (2) Timer-latch short-circuit protection circuit (SCP Comp., SR Latch) The latch circuit detects the output voltage levels of the error amplifiers. When the output voltage levels of the two error amplifiers reach about 2 ...
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... 1 SYNC VRT/R , VRT (pin voltage at pin 2) = 1.0 V (typical timing resistor ( REF 2I* 1.9 V 1.3 V “L” level: ON 3I* 1.4 V <External synchronous oscillation> 1 1 SYNC MB3832A ), and an external sync T Latch1 Latch2 ...
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... MB3832A TREATMENT OF UNUSED CSCP PIN When the timer-latch short-circuit protection circuit is not used, connect the CSCP pin (pin 5) to the GND at the shortest distance. Treatment of the CSCP pin when not used 16 5 CSCP GND 11 ...
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... REF . . = 1 given below REF • Figure b Not setting the dead time 1 VREF 16 DTC • Figure d Setting the dead time and a soft start R 1 Cdt R 2 MB3832A 1 VREF 16 DTC 17 ...
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... MB3832A EQUIVALE CIRCUIT (CTL, SYNC pin) • CTL pin • SYNC pin 18 CTL SYNC 4 1.4 V ...
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... APPLICATION EXAMPLE (Step-down scheme) MB3832A 19 ...
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... MB3832A REFERENCE DATA 0.5 Soft start operation waveforms 20 15 100 V ( CTL( Output voltage vs. output current characteristics IN2 REF IN2 ( IN2 c) ( IN2 b) 1 1.5 2 2.5 Output current I ( 120 160 Vin ...
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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 MB3832APFV Package 20-pin Plastic SSOP (FPT-20P-M03) MB3832A Remarks 21 ...
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... MB3832A PACKAGE DIMENSION 20-pin Plastic SSOP (FPT-20P-M03) * 6.50±0.10(.256±.004) 20 INDEX LEAD No. 1 0.65(.026) 0.10(.004) 1999 FUJITSU LIMITED F20012S-3C These dimensions do not include resin protrusion. 0.17±0.03 (.007±.001 4.40±0.10 6.40±0.20 (.173±.004) (.252±.008) Details of "A" part 10 " ...
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... MB3832A FUJITSU LIMITED For further information please contact: Japan FUJITSU LIMITED Corporate Global Business Support Division Electronic Devices KAWASAKI PLANT, 4-1-1, Kamikodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa 211-8588, Japan Tel: +81-44-754-3763 Fax: +81-44-754-3329 http://www.fujitsu.co.jp/ North and South America FUJITSU MICROELECTRONICS, INC. 3545 North First Street, San Jose, CA 95134-1804, U ...