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ROHM Semiconductor |
Charging control driver IC for
Portable telephone
BH3890FV
99W063A
Description
The BH3890FV is a charging IC developed for a
lithium ion battery (1 cell). Back-up charging circuit
and charging current monitor circuit are included.
This IC is directed by a micro computer controller.
Dimension (Units : mm)
Features
1) Built-in charging driver circuit
2) Built-in charging current monitor circuit
3) Built-in back-up charging circuit
4) Small package SSOP-B8
Applications
Portable telephone, PHS, equipment involving lithium ion battery
SSOP-B8
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Maximum supply voltage
Power dissipation
VCCMAX
Pd
Operating temperature range Topr
Storage temperature range
Tstg
* Derating : 3.0mW/˚C for operation above Ta=25˚C.
Limits
–0.3 ~ +7.0
300 *
–20 ~ +70
–55 ~ +125
Unit
V
mW
˚C
˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Power supply voltage
Symbol
VCC
Min.
5
Typ.
—
Max.
6
Unit
V
November, 1999
Electrical Characteristics (Unless otherwise noted, Ta=25˚C, Vcc= 5.5V, BPF=20 ~ 20kHz)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
<VCC circuit current>
Circuit current 1
IQ1 — 530 800 µA CHG1=OFF, CHG2=OFF
Circuit current 2
IQ2 — 1.0 1.7 mA CHG1=ON, REG=No load
Circuit current 3
IQ3 — 1.4 2.1 mA CHG2=ON, CHARGE section=No load
<BATV circuit current> (Current influx into BATV terminal )
Circuit current 4
IQ4
—0
5 µA CHG1=OFF, CHG2=OFF, Vcc=0V BATV=4.0V
<CURRENT>
Output voltage 1
VOC1 2.37 2.57 2.77 V VBATVH–VBATV=150mV
Output voltage 2
VOC2 0.44 0.54 0.64 V VBATVH–VBATV=0V
Coefficient of output
voltage inclination
LINC 12.7 13.5 14.3 — LINC=(VOC1–VOC2) / 0.15
Ripple rejection rate
RRC
VR=–20dBV, fR=100Hz, VBATVH=4.215V,
30 40 — dB VBATV=4.2V
Starting up voltage
VCCST
<REG> (CHG1=ON, CHG2=OFF)
—
— 3.5
V VCC (VOC2≥ 0.4V)
Output voltage
VOR 4.35
Ripple rejection rate
RRR 30
Maximum output current IORMAX 10
<CHARGE> (CHG1=OFF, CHG2=ON)
Control voltage
VOB 4.15
Ripple rejection rate
RRB 30
Load regulation
∆ VOB1 —
Input voltage stability
∆ VOB2 —
4.45 4.55
40 —
15 20
4.20 4.25
40 —
5 30
5 30
V IO=5mA
dB VR=–30dBV, fR=100Hz, IO=5mA
mA VOR≤ 4.0V
V IO=100mA
dB VR=–20dBV, fR=100Hz, IO=100mA
mV IO=1~800mA
mV VCC=5.0~6.0V, IO=100mA
Application circuit
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