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PDF RT9545 Data sheet ( Hoja de datos )
| Número de pieza | RT9545 | |
| Descripción | Li-Ion Battery Protector | |
| Fabricantes | Richtek Technology | |
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Preliminary
RT9545
Li-Ion Battery Protector
General Description
Features
The RT9545 Series are protection ICs for over-charge/
discharge of rechargeable one-cell Lithium-ion (Li+)
batteries by CMOS process.
The RT9545 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-23-6 is available.
Ordering Information
RT9545
Low Supply Current
−Supply Current: Typical 2.0µA
−Standby Current (after Detecting Over-discharge)
: Less than 0.2µA
High Accuracy Detector Threshold
−Over-Charge Detector : −90mV to +40mV
−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 0.01µF
Ultra Small Package: SOT-23-6
RoHS Compliant and 100% Lead (Pb)-Free
Package Type
E : SOT-23-6
ER : SOT-23-6 (R-Type)
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Over-charge / Over-discharge
O : 4.35V / 2.5V
T : 4.25V / 2.9V
S : 4.35V / 2.9V
Note :
RichTek Pb-free products are :
−RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
−Suitable for use in SnPb or Pb-free soldering processes.
−100%matte tin (Sn) plating.
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
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
(TOP VIEW)
V- VDD DOUT
VSS VDD CT
654
654
123
123
COUT CT VSS
SOT-23-6
DOUT V- COUT
SOT-23-6 (R-Type)
Note : There is no pin1 indicator on top mark for SOT-23-6
type, and pin1 will be lower left pin when reading top mark
from left to right.
DS9545-06 March 2005
www.richtek.com
1
1 page  
Preliminary
RT9545
Parameter
Short Detection Voltage During
Discharge
Output Delay of Discharge Short
Circuit
Reset Resistance for Excess
Current Protection
Symbol
TSHORT
RSHORT
Test Conditions
VDD = 3.0V
VDD = 3.0V
VDD = 3.6V, V- = 1.0V
Supply Current
IDD VDD = 3.9V, V- = 0V
Min Typ Max Units
VDD-1. VDD-0. VDD-0.
185
V
-- 5 50 µs
25 50 75 kΩ
-- 2.0 5.0 µA
Standby Current
ISTANDBY VDD = 2.0V
-- 0.1 0.5 µA
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
DS9545-06 March 2005
www.richtek.com
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet RT9545.PDF ] | |
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