0Z9938GN Datasheet PDF – LCDM Inverter Controller

Part Number: 0Z9938GN

Correct Part Number: OZ9938GN

Function: LCDM Inverter Controller

Package: SOP 16 Pin

Manufacturer: O2Micro




The 0Z9938GN is a high performance, cost-effective CCFL (Cold Cathode Fluorescent Lamp) controller designed for driving large-size Liquid Crystal Display (LCD) applications requiring 2 to 6 CCFLs.
The controller converts unregulated DC voltages into a nearly sinusoidal lamp voltage and current

The OZ9938 provides two drive signals for most power conversion topologies while maintaining
high-efficiency operation. The PWM controller provides a soft-start operation, current and
voltage regulation, over-voltage and over-current protection, high drive capability and multiple
dimming functions (internal PWM or external PWMor analog dimming functions).

The control logic provides a regulated ignition voltage and appropriate protection features for over-voltage or over-current conditions. The OZ9938 offers a high level of integration, while maintaining flexibility and high-efficiency operation that reduces external component heating, resulting in higher reliability and longer CCFL life. The proprietary design technique provides a simple, low-cost system solution.



1. Positive PWM dimming polarity

2. Constant operating frequency

3. Drives positive/negative-impedance lamps during ignition

4. High drive current for external MOSFETs

5. User-defined ignition time and shutdown delay time

6. Multiple mode dimming control

7. Built-in intelligence for ignition and normal operation of CCFLs

8. Built-in open-lamp protection and over voltage protection for backlight system

9. Optimized soft-start function

Ordering Inforamtion:

0Z9938GN OZ9938GN Datasheet

0Z9938GN Datasheet

0z9938 pdf