RT9541 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – LI LON BATTERY PROTECTOR

Preliminary
RT9541
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… … … …
Package type
E : SOT-26 Type I
ER : SOT-26 Type II
Operating temperature range
C: Commercial standard
See Table 1
Typical Application Circuit
R1
+
100Ω
C1
0.1µF
CT
C3
0.01µF
VSS
VDD
RT9541
V-
DOUT COUT
C2
0.1µF
R2
1KΩ
Features
z Low supply current
− Supply current: TYP. 2.0µA
− Standby current (after detecting over-
discharge): Less than 0.2µA
z High accuracy detector threshold
− Over-charge detector: ±25mV
− Over-discharge detector: ±2.5%
z Built-in protection circuit
− Excess current trip/Short circuit protector in
both charging and discharging direction
z Output delay of over-charge adjustable with
an external capacitor: 75mS at 0.01µF
z Ultra small package: SOT26
Applications
z Over-charge / Over-discharge Protection for Li+
One-cell Pack
z High Precision Protectors for Cellular Phones or
Instruments Using Li+ One-cell Battery
Pin Configurations
Part Number
RT9541…CE
(Plastic SOT-26)
Pin Configurations
TOP VIEW
65 4
123
1. COUT
2. CT
3. VSS
4. DOUT
5. VDD
6. V-
RT9541…CER
(Plastic SOT-26)
65 4
123
TOP VIEW
1. DOUT
2. V-
3. COUT
4. CT
5. VDD
6. VSS
DS9541-05 August 2001
www.richtek-ic.com.tw
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