RICOH R5402N Series Li-ion polymer 1Cell Protector User Guide

R5402N Series Li-ion/polymer 1Cell Protector

The R5402Nx Series are high input voltage CMOS-based protection ICs for over-charge/discharge of rechargeable one-cell Lithium-ion (Li-ion) / Lithium polymer excess load current, further include a short circuit protector for preventing large external short circuit current and excess charge/discharge-current. Each of these ICs is composed of four voltage detectors, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and a logic circuit. SOT-23-5 package is available.

FEATURES • Supply Voltage (VDD) ···························· 12V (Absolute Maximum Rating) • Excess Detector Threshold Range ···· 0.05V to 0.20V (0.005V steps) • Charger Negative Input Voltage (V-) ··· -35V (Absolute Maximum Rating) discharge-current Detector Threshold Accuracy ····· ±15m V • Operating Input Voltage Range (VDD) ····· 1.5V to 5.0V (VDET3) Output Delay Time (t VDET3) ···· Typ. 6ms or 12ms • Supply Current (IDD) ····························· Typ. 4.0μA • Excess Detector Threshold Range ···· -0.1V • Standby Current (Is) ····························· Max. 0.1μA (C Version) charge-current Detector Threshold Accuracy ····· ±30m V

Max. 2.0μA (B, D Version) (VDET4) Output Delay Time (t VDET4) ···· Typ. 8ms or 16ms

• Over-charge Detector Threshold Range······· 4.0V to 4.5V (0.005V steps) • Short Protection Voltage (Vshort)······················· Typ. 0.8V

(VDET1) Detector Threshold Accuracy··· ±25m V (25°C) Output Delay Time (tshort) ······ Typ. 200μs or 300μs

±30m V (-5 to 55°C) • 0V-battery charge·············································

Available

Output Delay Time (t VDET1) ······ Typ. 1.0s or 0.25s • Package

··························································· SOT-23-6

• Over-discharge Detector Threshold Range······· 2.0V to 3.0V (0.1V steps) (VDET2) Detector Threshold Accuracy··· ±2.5%

Output Delay Time (t VDET2) ······ Typ. 20ms

BLOCK DIAGRAMS R5402Nxxxx B R5402Nxxxx C R5402Nxxxx D

VDD VDD VDD

DC Circuit DC Circuit DC Circuit

Oscillator Counter Oscillator Counter Oscillator Counter

Logic Level Logic Level Logic Level Circuit Shift Circuit Shift Circuit Shift

VD1 VD1 VD1

Short Short Short

Delay Delay Delay

Detector Detector Detector

VD4 VD4 VD4

Logic Logic Logic Circuit Circuit Circuit

VD2 VD2 VD2

VD3 VD3 VD3

VSS DOUT COUT V- VSS DOUT COUT V- VSS DOUT COUT V-

SELECTION GUIDE Package Quantity per Reel Part No. SOT-23-6 3,000 pcs R5402N.xxx.$.∗ -TR-FE

.xxx : Serial Number for the R5402 Series designating input four threshold for .∗ : Designation of version symbols

over-charge, over-discharge, excess discharge-current, and excess (.B.) With Latch function after Over-charge, Auto Release after Over-discharge charge-current detectors (.C.) With Latch function after Over-charge and Over-discharge Designation of Output delay time option of over-charge, (.D..) Auto Release after Over-charge and Over-discharge excess discharge-current, and excess charge-current. (.C.) t VDET1=1.0s, t VDET3=12ms, t VDET4=16ms (.E.) t VDET1=1.0s, t VDET3=6ms, t VDET4=8ms (.F.) t VDET1=0.25s, t VDET3=12ms, t VDET4=16ms (.K.) t VDET1=1.0s, t VDET3=12ms, t VDET4=8ms

PACKAGE (Top View)

SOT-23-6

6 5 DOUT V- COUT NC VDD

APPLICATIONS • Li-ion / Li polymer protector of over-charge, over-discharge, excess discharge-current, excess charge-current for battery pack • High precision protectors for cell-phones and any other gadgets using on board Li-ion / Li polymer battery

Li-ion/polymer 1Cell Protector