Lithium-Battery Charger Controller IC with Timer / DMP20 / SSOP20 - JRC
Description
NJW4120
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Lithium-ion Battery Charger Controller IC with Timer
■GENERAL DESCRIPTION ■PACKAGE OUTLINE NJW4120 is a 1-cell and 2-cell lithium ion battery charge control IC with a built-in AC-DC secondary side control feature.
Using a photocoupler to directly feed back optimum charging voltage and current information to the primary side, it increases energy efficiency, makes possible a smaller charger, and conserves energy.
Charging current can be freely set and therefore it is NJW4120M possible to optimize charging according to battery capacity.
As safety features it has over voltage, over discharge, temperature detection, and a charge over timer.
Also, the adaptor and the charge control circuit are mounted on one chip.
■FEATURES ● Charge Control Feedback by Photocoupler ● Adjustable Charge Voltage ● Adjustable Pre-Charge and Full Charge Current ● Temperature Monitor ● Over Charge Timer ● Internal Re-Charge function ● Delay timers and Hysteresis inputs for high noise immunity ● Over Discharge Battery Detect ● Over Voltage Protection ● Bi-CMOS Technology ● Package Outline NJW4120M : DMP20 NJW4120V : SSOP20 ■PIN CONFIGURATION
P-CHG NFB TX-SW GND PC ADP LED-G LED-R C1 C2
1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11
NJW4120V
Q-CHG CS1 CS2 VS VREF V+ TDET TH TL CHG-SW
NJW4120M NJW4120V
Ver.
2006-01-18
-1-
NJW4120
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DataSheet4U.
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■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Operating Voltage V+ C1 Pin Voltage VC1 C2 Pin Voltage VC2 TDET Pin Voltage VTDET TX-SW Pin Output Current ISINK-SW PC Pin Output Current ISINK-PC LED-G Pin Output Current ISINK-G LED-R Pin Output Current ISINK-R Power Dissipation Operating Temperature Range Storage Temperature Range PD Topr Tstg
MAXIMUM RATINGS +15 +5 +5 +5 50 50 20 20 DMP20 :300 SSOP20 :300 -20~+85 -40~+125
UNIT V V V V mA mA mA mA mW °C °C
■ELECTRICAL CHARACTERISTICS (V+=5V, Ta=25°C) PARAMETER General Characteristics Operating Voltage Operating Current Under Voltage Lockout Block ON Thresh...
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