High Accuracy Li-ion polymer 1Cell Protector IC for RICOH R5470x R5471x Series Data Manual User Guide
Summary
The R5470x/R5471x series offers high-accuracy, CMOS-based protection ICs designed for one-cell Li-ion and Li-polymer batteries. This sophisticated component automatically protects against critical hazards including over-charge, over-discharge, excess current, and short circuits. The manual provides comprehensive specifications, block diagrams, and application guidance, detailing adjustable thresholds and reliable performance within various electronic devices like cell phones and portable gadgets. It is an essential solution for designers needing precision battery management and enhanced safety in their final products.
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R5470x/R5471x Series High Accuracy Li-ion/polymer 1Cell protector IC
The R5470x/5471x Series are high input voltage CMOS-based protection ICs for over-charge/discharge and over-current of rechargeable one-cell Lithium-ion/Lithium polymer battery. They can detect over-charge/discharge and excess-current of one-cell Li-ion, further include a short circuit protection. They consist of four voltage detectors, reference units, a delay circuit, a short circuit detector, an oscillator, a counter, and a logic circuit. Voltage accuracy is superior to previous items. DFN(PLP)2114-4B (for R5470K) and DFN(PLP)1616-6B (for R5471K) packages are available.
FEATURES • Supply Voltage (VDD)··································· 12V (Absolute Maximum Rating) • Excess Detector Threshold Range···· 0.05V to 0.13V (0.005V steps) • Charger Negative Input Voltage (V-) ·········· -30V (Absolute Maximum Rating) discharge-current Detector Threshold Accuracy ···· ±10m V • Operating Input Voltage Range (VDD)············ 1.5V to 5.0V (VDET3) Output Delay Time (t VDET3) ··· Typ.12ms • Supply Current (IDD) ···································· Typ.4.0μA • Excess Detector Threshold Range···· -0.05V to -0.15V(0.005V steps) • Standby Current (Is) ···································· Max.0.1μA charge-current Voltage Accuracy ·················· ±20m V • Over-charge Detector Threshold Range ···· 4.1V to 4.5V (0.005V steps) (VDET4) Output Delay Time (t VDET4) ··· 16ms (VDET1) Detector Threshold Accuracy··· ±10m V (0°C to 50°C) • Short Protection Voltage (Vshort) ······················ Typ.0.6V
Output Delay Time (t VDET1) ···· Typ.1.0s Output Delay Time (tshort)······ Typ.250μs
• Over-discharge Detector Threshold Range····· 2.0V to 3.0V (0.1V steps) • 0V-battery charge ············································ Unavailable
(VDET2) Detector Threshold Accuracy··· ±2.5% • Packages ························································· DFN(PLP)2114-4B (R5470K)
Output Delay Time (t VDET2) ···· Typ.20ms DFN(PLP)1616-6B (R5471K)
BLOCK DIAGRAMS
R5470xxxx/ R5471xxxx VDD
DC Circuit
Oscillator Counter
Logic Level Circuit Shift
Short
Delay
Detector
Logic Circuit
VSS DOUT COUT V-
SELECTION GUIDES
Package Quantity per Reel Part No. .xxx : Serial Number of R5470x/R5471x Series designating input four threshold for over-charge, over-discharge, excess discharge-current, and excess
DFN(PLP)2114-4B 5,000 pcs R5470K.xxx.$.∗ -TR
charge-current detectors.
DFN(PLP)1616-6B 5,000 pcs R5471K.xxx.$.∗ -TR
Designation of Output delay time option of over-charge, excess charge-current, and excess discharge-current. (.C.) t VDET1=1s, t VDET2=20ms, t VDET3=12ms, t VDET4=16ms, tshort=250μs .∗ : Design of protection type. (.G.) With Latch function after Over-charge and Over-discharge.
PACKAGES
DFN(PLP)2114-4B DFN(PLP)1616-6B Bottom View Top View
Top View Bottom View 1 VSS
2 VDD
2 COUT
3 COUT
3 DOUT
4 VSS
5 VDD
2 1 2 1 6 DOUT
∗) The tab is substrate level (VDD)
APPLICATIONS • Li-ion/Li Polymer protector of over-charge, over-discharge, excess-current for battery pack • High precision protectors for cell-phones and any other gadgets using on board Li-ion/Li Polymer battery
High Accuracy Li-ion/polymer 1Cell protector IC
Page Summary Contents For High Accuracy Li-ion polymer 1Cell Protector IC for RICOH R5470x R5471x Series Data Manual User Guide
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 1 |
| File Size | 84.13 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What types of batteries are these ICs designed to protect?
They are designed for rechargeable one-cell Lithium-ion or Lithium polymer batteries.
How does the device detect overcharge and excess discharge-current?
It uses multiple voltage detectors (VDET1 through VDET4) with configurable threshold ranges, for instance, 4.1V to 4.5V for overcharge detection.
What is the average power consumption of the IC when operating in standby mode?
The maximum standby current (Is) is 0.1μA, and the typical supply current (IDD) is 4.0μA.
Are there options available for varying protection response timing?
Yes, output delay times (tVDETx) are configurable, with values like 1s (tVDET1), 20ms (tVDET2), and 16ms (tVDET4) being specified.