Rainbow-electronics DS2710 Uživatelský manuál stáhnout pdf (Strana 4)

DS2710

Single-Cell NiMH Charger

4 _______________________________________________________________________________________

Pin Description

PIN NAME FUNCTION

1 V

Device Ground. Connects directly to the negative terminal of the charge source.

2 CS Charge Source. Feedback control for switching circuitry.

3 V

Power-Supply Input. Connects to the positive terminal of the charge source through a decoupling

network.

4 THM Thermistor Input. Connects to a thermistor located near the cell and a resistor-divider from the V

pin.

5 STATUS Status Output. Drives an external LED or microprocessor input to indicate charge status.

6 CTEST Impedance Test. Connects to V

through an external resistor to set the impedance-test threshold.

7 TMR Fast-Charge Timer. Connects to V

through an external resistor to set the fast-charge timeout period.

8 VN0 Current-Sense Negative Input. Connects to the charge source side of the external sense resistor.

9 VN1 Current-Sense Positive Input. Connects to the cell side of the external sense resistor.

10 VP1 Cell Voltage Sense. The voltage of the cell is monitored through this input pin.

— EP Exposed Pad. Connects to V

DS2710

BIAS

OSCILLATOR

WATCHDOG

ABORT

VP1

PTST

UVLO

3.5V

STATUS

CTEST

STATUS

MAINTENANCE CHARGE

TOP-OFF CHARGE

SUSPEND

PRECHARGE

PRESENSE TEST

STATE MACHINE

FAST-CHARGE AND

CELL TESTS

VOLTAGE

AND

TEMPERATURE

MEASUREMENT

DUTY-

FACTOR

CONTROL

VN1

THM

0.125V

0.1μA

VN0

CELL

TEST

TMR

CHARGE

TIMER

Figure 1. Block Diagram

1 2 3 4 5 6 7 8 9 10 11 12

Single-Cell NiMH Charger 1

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