RICOH R5462K Series Data Sheet

R5462K Series

High Accuracy Li-ion/polymer 2Cell protector

The R5462x Series are high voltage CMOS-based protection ICs for over-charge/discharge of rechargeable two-cell Li-ion/Lithium polymer, further include a short circuit protection circuit for preventing large external short circuit current and the protection circuits against the excess discharge-current and excess charge current. Each of these ICs is composed of six voltage detectors, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and logic circuits. The over-charge detector threshold is high accuracy such as ±10m V(0°C∼50°C). DFN(PLP)1820-6B package is available.

FEATURES

• Supply Voltage (VDD) ······································· 12V (Absolute Maximum Rating) • Excess Detector Threshold Range ········ 0.05V to 0.2V (0.005V steps)

• Charger Negative Input Voltage (V-) ··············· −30V (Absolute Maximum Rating) discharge-current Voltage Accuracy······················· ±10m V • Operating Input Voltage Range (VDD) ············· 1.5V to 10.0V (VDET3) Output Delay Time (t VDET3)········ 12ms • Supply Current (IDD)········································· Typ. 4.0μA • Excess Detector Threshold···················· −0.2V to −0.1V • Standby Current (Is)········································· Max.0.1μA or 2.0μA charge-current Voltage Accuracy······················· ±20m V • Over-charge Detector Threshold Range····· 3.65V to 4.32V (0.005V Steps) (VDET4) Output Delay Time (t VDET4)········ 8ms

(VDET1) Voltage Accuracy···················· ±10m V (0°C∼50°C) • Short Protection Detector Threshold (Vshort) ········ Typ. 1.0V Output Delay Time (t VDET1)····· 1.0s Output Delay Time (tshort) ·········· Typ. 300μs

• Over-discharge Detector Threshold Range····· 2.0 to 3.2V (0.1V Steps) • 0V-battery charge ···················································· Selectable

• (VDET2) Voltage Accuracy···················· ±1.0% • Packages ································································· DFN(PLP)1820-6B

Output Delay Time (t VDET2)····· 128ms

BLOCK DIAGRAMS

R5462K2xx AG

DC Circuit

Oscillator Counter

VD1U Logic Level

Circuit Shift

VD2U Short

VC Delay

Detector

VD1L VD4 Logic

Circuit

VD2L VD3

VSS DOUT COUT V-

SELECTION GUIDE Halogen Free Package Quantity per Reel Part No.

DFN(PLP)1820-6B 5,000 pcs R5462K2.xx.$.∗ -TR

.xx : Serial Number for the R5462x Series designing .∗ : Designation of protection type.

input four threshold for over-charge, (.G..) Auto Release after Over-charge and with Latch function after Over-discharge. 0V-battery charge is unavailable. over-discharge, excess discharge-current and excess charge-current detectors. Designation of Output delay option of over-charge, over-discharge, excess charge-current, excess discharge-current. (.A.) t VDET1=1s, t VDET2=128ms, t VDET3=12ms, t VDET4=8ms

PACKAGE

DFN(PLP)1820-6B

Top View Bottom View

V- DOUT VSS VDD 1 2 3 VC

∗) The tab is substrate level (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 DSLR, portable DVD player and any other gadgets using on board Li-ion/Li polymer battery

Li-ion/polymer 2Cell protector