Special Contents for Automotive Applications
The reason RICOH power management IC has been chosen for more than 20 years
Special Contents for IoT Devices
Ultra-low supply current / Low noise / Low electromotive force / Battery monitoring
Special Contents for Industrial Applications
Long term supply / Flexible quantity purchase / High quality and reliability
The R5437 is an overcharge protection IC for 1 to 3 serial cells Li-ion / Li-polymer rechargeable battery. This device provides the high-accuracy voltage detection function and the shutdown function can reduce the supply current to the minimum when all cell’s voltage becomes less than the shutdown detection voltage.
|Operating Input Voltage Range||1.5 V to 20 V or VC1 +5 V (Absolute Maximum Rating 26 V)|
|Supply Current||Typ. 0.85 µA|
|Overcharge (VDET1)||Detector Threshold Range||4.1 V to 4.6 V (0.005 V Steps)|
|Detector Threshold Accuracy||±0.02 V|
|Detection Delay Time||2 s, 4 s, 6 s with Delay Time Shortening Function*1|
|Release Voltage||VDET1 to VDET1−0.5 V (0.05 V Steps)|
|Release Voltage Condition||Voltage Release Type|
|Shutdown||Detector Threshold||3.5 V ±0.3 V|
|Shutdown Current||Max. 0.1 µA|
|Functions||1 to 3 Cells Selectable Battery Protection|
*1: The delay time can be reduced down to approx. 1/90 by applying a 4 V ± 0.2 V to the VDD ‒ VC1 pins.
PRODUCT LONGEVITY PROGRAM
R5437 operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.
The overcharge and the delay time are user-selectable options.
|Product Name||Package||Quantity per Reel|
|Code||tVDET1 (s)||tVREL1 (ms)|
*1: VDET1n, VREL1n : n =1, 2, 3
*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.