ISL9209C

Charging System Safety Circuit

Product Status: 量産中

OVERVIEW

The ISL9209C is an integrated circuit (IC) optimized to provide a redundant safety protection to a Li-ion battery from failures of a charging system. The IC monitors the input voltage, the battery voltage, and the charge current. When any of the three parameters exceeds its limit, the IC turns off an internal P-Channel MOSFET to remove the power from the charging system. In addition to the above protected parameters, the IC also monitors its own internal temperature and turns off the P-Channel MOSFET when the temperature exceeds +140°C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9209C has triple-level protection and is two-fault tolerant.

The IC is designed to turn on the internal PFET slowly to avoid in-rush current at power-up but will turn off the PFET quickly when the input is overvoltage in order to remove the power before any damage occurs. The ISL9209C has a logic warning output to indicate the fault and an enable input to allow the system to remove the input power.

KEY FEATURES

  • Fully Integrated Protection Circuit for Three Protected Variables
  • High Accuracy Protection Thresholds
  • User Programmable Overcurrent Protection Threshold
  • Input Overvoltage Protection in Less Than 1µs
  • High Immunity of False Triggering Under Transients
  • Warning Output to Indicate the Occurrence of Faults
  • Enable Input
  • Easy to Use
  • Thermal Enhanced TDFN Package
  • Pb-Free (RoHS Compliant)

PARAMETRICS

Parameters
ISL9209C
Basic Information
Production Status
量産中
プログラマブル過電流範囲 (A)
0 to 1.5
入力過電圧保護 (Typ.)
5.58 V
バッテリ過電圧保護 (Typ.)
4.34 V
バッテリリーク電流
20nA max @ 4.4VVB
バッテリ過電圧保護 (min)
4.28 V
バッテリ過電圧保護 (max)
4.4 V
入力過電圧保護 (min)
5.65 V
入力過電圧保護 (max)
6 V
プログラマブル過電流 (max)
1.5 A
Ron @ 500mA (Typ.)
170 mΩ
Ron @ 500mA (max)
280 mΩ
認定レベル
Standard
バッテリ過電圧保護
4.34 typ, 4.28 min, 4.4 max
入力過電圧保護
5.58 typ, 5.65 min, 6.0 max
Ron @ 500 mA
170 typ, 280 max
CANサンプル
YES
温度範囲
-40 to +85

ブロック図

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