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MB3813A

Fujitsu Media Devices
Part Number MB3813A
Manufacturer Fujitsu Media Devices
Description Lithium Ion Battery Charger DC/DC Converter
Published Sep 11, 2005
Detailed Description FUJITSU SEMICONDUCTOR DATA SHEET DS04-27700-3E ASSP For Power Management Applications (Secondary battery) Lithium Ion...
Datasheet PDF File MB3813A PDF File

MB3813A
MB3813A

Overview
FUJITSU SEMICONDUCTOR DATA SHEET DS04-27700-3E ASSP For Power Management Applications (Secondary battery) Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) MB3813A/MB3833A/MB3843 s DESCRIPTION The FUJITSU MB3813A/33A/43 are pulse width modulation (PWM) DC/DC converter ICs with independent output voltage and current setting capability.
The use of on-chip output setting resistance enables high precision output voltage control.
Also, an output voltage switching feature for use with either graphite-electrode or coke-electrode lithium-ion batteries makes this IC ideal for internal battery chargers in notebook personal computers and similar applications.
Cell count 3-cell 2-cell 1-cell 8.
4 V/8.
2 V 4.
2 V/4.
1 V Output voltage 12.
6 V/12.
3 V MB3813A MB3833A MB3843 Part number s FEATURES • • • • • Output setting resistance is on-chip for high precision output voltage: ±1.
0% SEL pin enables output voltage selection High precision reference voltage source: 2.
5 V ± 1.
0% High frequency operating capability: max.
500 kHz On-chip current detector amplifier with wide in-phase input voltage range: 0 V to VCC (Continued) s PACKAGE 16-pin plastic SSOP (FPT-16P-M05) MB3813A/MB3833A/MB3843 (Continued) • On-chip standby function • On-chip input voltage detector circuit • On-chip soft start control circuit • On-chip output overshoot protection circuit for rapid load changes • On-chip totem-pole output circuits for P-ch.
MOS FET devices 2 MB3813A/MB3833A/MB3843 s PIN ASSIGNMENT (Top view) Vin1 : 1 IN1 : 2 IN2 : 3 -IN2 : 4 -IN1 : 5 FB : 6 CTL : 7 Vin2 : 8 16 : GND 15 : OUT 14 : VCC 13 : CT 12 : RT 11 : CS 10 : SEL 9 : VREF (FPT-16P-M05) 3 MB3813A/MB3833A/MB3843 s PIN DESCRIPTION Pin no.
1 2 3 4 5 6 7 8 9 10 Symbol Vin1 IN1 IN2 -IN2 -IN1 FB CTL Vin2 VREF SEL I/O I I I I I O I I O I Descriptions Input voltage detector block (VLDET) input pin Current detector amplifier (Current Amp.
) input pin Output voltage feedback input pin Error a...


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