ZLED7015

1.0MHz Boost Converter with Internal 35V Switch

Data Sheet

December 20, 2011

© 2011 Zentrum Mikroelektronik Dresden AG

— Rev. 1.00

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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S

S

R

R

R

V

V

FB

OUT

)

(









S

R

R

R

V

D

V

R

V

I

FB

PWM

PWM

FB

OUT

























5

3

4

The output current controlled by the PWM voltage on FB can be calculated using equation (3):

(3)

Where

2.2.4

Microcontroller LED Control

A microcontroller can control the LED output current by providing a PWM control signal to the FB pin as

described in section 2.2.3.

Depending on the application, the microcontroller can also be used to control the shutdown circuitry via the

EN pin (see section 2.1) providing a fast and smooth transition to shutdown.

2.2.5

Constant Voltage Application

In addition to functioning as a constant-current boost converter for driving an LED string, the ZLED7015 can

circuit for this application.

(4)

Where