QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 783

NIMH/NICD CHARGER

2

QUICK START PROCEDURE

FEATURES INCLUDE:

• Jumper to select battery chemistry, NiMH or

NiCd

• Jumpers to select number of cells

• Jumper to select NTC Thermistor function

• Jumper to select recharge voltage level

• Jumper to select safety timer period

• Jumper to select charge (0.5A, 1A & 2A)

• Terminals for custom timer periods and charge

current

• Terminals for system load

• Resistor pads for optional external current sense

resistor

• LEDs to indicate charger status

o ACPR – Sufficient input voltage for charging

o CHRG – Charging

TYPICAL DEMO BOARD SPECIFICATIONS

Minimum Input Voltage (1 series cell) - 4.5V

(2 series cells) - 4.5V

(3 series cells) - 6.9V

(4 series cells) - 8.6V

Maximum Input Voltage - 10V

Constant Charge Current - 0.5A, 1A & 2A (±8%)

Safety Timer - 1.5Hrs & 3Hrs (±20%)

- V Termination (NiCd) - 16mV (± 2mV)

- V Termination (NiMH) - 8mV (± 1.5mV)

Recharge Threshold Voltage-OFF, 1.2V & 1.3V (±5%)

Precharge Current - 20% of Programmed Current

(±8%)

TEST EQUIPMENT REQUIRED FOR DEMO BOARD

EVALUATION:

Lab Power supply for input power. 0 to 10V @ 2A

Digital multimeter for measuring battery voltage

(VBAT).

3-1/2 digits

Digital multimeter for measuring charge current

4 cell, 2000 mAHr NiCd or NiMH battery pack (10k

Ω

NTC thermistor optional)

10

Ω 10W power resistor for System Load (optional).