ZLED7012

Low-Voltage Four-Channel LED Driver

Data Sheet

November 9, 2010

© 2010

Zentrum Mikroelektronik Dresden AG — Rev. 1.0

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without

the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

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Select a pump capacitor value in the range of 0.47µF to 2.2µF depending on output current requirements; 1µF is recom-

mended for most applications. When designing the circuit to operate at high levels of output current, choose a higher value of

capacitance; low output currents do not require a large pump capacitor. As with Cin and Cout, low ESR ceramic capacitors are

recommended for the pump capacitor. See section 4.2.1 for a discussion of low ESR capacitors.

4.2.3.

LEDs

The ZLED7012’s low dropout current sinks are capable of driving most types of LEDs with forward voltages as high as 4.7V at

full current with a Vcc input supply of 2.8V to 5.5V. High-current LEDs can be driven by using any of the D3:D0 pins in parallel.

because the [D3:D0] output current sinks are matched with negligible voltage dependence (see section 1.3 for specifications).

4.3.

Unused LED Driver Pins

LED driver pin D0 must always be used. If any of the LED driver pins [D1:D3] are unused, disable the pin(s) by connecting

them to ground to avoid noise coupling.

5

ESD Protection

From each I/O or VCC pin to GND, there is an ESD protection of

±3000V. Between the I/O pins, there is an ESD protection of

±1000V according the Human Body Model (HBM). The ESD test follows the Human Body Model with 1.5 kΩ/100 pF based

on MIL 883-G, Method 3015.7.

6

Pin Configuration and Package

Figure 6.1

Pin Configuration ZLED7012 – Top View

1

2

3

7

8

9

GND

NC

NC

VCC

VOUT

D0