ZXSC410/ZXSC420/ZXSC440

Document number: DS33618 Rev. 5 - 2

13 of 17

www.diodes.com

March 2013

© Diodes Incorporated

ZXSC410/ZXSC420/ZXSC440

Battery Powered Two 1W LED Lamp

This application shows the ZXSC410/420/440 driving 2 serial LEDs. The input voltage ranges from 2V to 3.6V with a maximum output current of

360mA from 2.6V input.

The wide input voltage range allows the use of different battery cell combinations. This could be dual alkaline cells with voltage starting from 3V

down to 2V or triple NiCad/NiMH cells with voltage starting from 3.6V down to 2.7V.

2.8

2.6

2.4

2.2

2.0

3.6

3.4

3.2

3.0

INPUT VOLTAGE (V)

Efficiency vs. Input Voltage

100

90

60

50

80

70

0.4

0.0

0.2

2.8

2.6

2.4

2.2

2.0

3.6

3.4

3.2

3.0

INPUT VOLTAGE (V)

LED Current vs. Input Voltage

ZXSC410

ZXTN25012EFH

ZHCS2000

22µH

18mΩ

820mΩ

22µF

100µF