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RT9541ECE Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part # RT9541ECE
Description  LI LON BATTERY PROTECTOR
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RT9541ECE Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

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Preliminary
RT9541
DS9541-05 August 2001
www.richtek-ic.com.tw
1
Li-Ion Battery Protector
General Description
The RT9541 Series are protection ICs for over-
charge/discharge of rechargeable one-cell Lithium-ion
(Li+) batteries by CMOS process.
The RT9541 Series can detect over-charge/discharge
of Li+ one-cell and excess load current and charge
current, further include a short circuit protector for
preventing large external short circuit current.
Each of these ICs is composed of four voltage
detectors, a reference unit, a hysteresis circuit, and a
bidirectional short circuit protector. Package of SOT-
26 is available.
Ordering Information
RT9541
Typical Application Circuit
Features
Low supply current
− Supply current: TYP. 2.0µµµµA
− Standby current (after detecting over-
discharge): Less than 0.2
µµµµA
High accuracy detector threshold
− Over-charge detector: ±±±±25mV
− Over-discharge detector: ±±±±2.5%
Built-in protection circuit
− Excess current trip/Short circuit protector in
both charging and discharging direction
Output delay of over-charge adjustable with
an external capacitor: 75mS at 0.01
µµµµF
Ultra small package: SOT26
Applications
Over-charge / Over-discharge Protection for Li+
One-cell Pack
High Precision Protectors for Cellular Phones or
Instruments Using Li+ One-cell Battery
Pin Configurations
Part Number
Pin Configurations
RT9541 CE
(Plastic SOT-26)
TOP VIEW
1. COUT
2. CT
3. VSS
4. DOUT
5. VDD
6. V-
RT9541 CER
(Plastic SOT-26)
TOP VIEW
1. DOUT
2. V-
3. COUT
4. CT
5. VDD
6. VSS
64
3
2
1
5
64
3
2
1
5
Operating temperature range
C: Commercial standard
Package type
E : SOT-26 Type I
ER : SOT-26 Type II
See Table 1
RT9541
VDD
CT
VSS
DOUT
COUT
V-
+
R1
100
C1
0.1
µF
C3
0.01
µF
C2
0.1
µF
R2
1K


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