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OZ9939 반도체 회로 부품 판매점

Change Summary



O2Micro 로고
O2Micro
OZ9939 데이터시트, 핀배열, 회로
CHANGES
No. Applicable Section
1. Electrical Characteristics
OZ9939www.DataSheet4U.com
Change Summary
Description
Updated limits for Protection Release Threshold
Page(s)
3
REVISION HISTORY
Revision No.
0.6
0.65
1.0
Description of change
Initial release
1. Electrical Characteristics: a. Modify general test conditions in line 1; b.
Modify ‘Driver Frequency – Striking & Normal Operation’ Typ limit; c.
Modify ‘PWM Dimming Control – LCT frequency’, 2. Reference
Application Circuit: Modify C14, C9 & R9 values
Ordering Information: Add OZ9939G, IG, D & DN. Recommended
Operating Range: 1. Add ‘Dimming Range’; 2. Fill in ‘Thermal Impedance’.
Electrical Characteristics: 1. Update ‘Supply Current’ limits; 2. Update ‘Soft
Start’ limits; 3. Update ‘Under Voltage Lockout’ limits; 4. Update ‘Reference
Voltage’ limits; 5. Update ‘Driver Frequency’ limits; 6. Update ‘Timer &
Protection’ limits; 6. Update ‘Drivers’ parameter name & limits; 7. Update
‘PWM Dimming Control’ limits; 8. Delete ‘Analog Dimming Control’.
Function Description: Update formula in NO. 4 Ignition, No. 6 Normal
Operation & No. 9 Dimming Control. Package Information: Add DIP
package drawing. Throughout datasheet: Miscellaneous changes.
Release Date
5/12/2005
6/27/2005
9/21/2005
10/27/2005
OZ9939-DS-1.1
Copyright © 2005 by O2Micro
All Rights Reserved
Patent#6,559,606, #6,856,519 & #6,809,93800
Page 0
CONFIDENTIAL


OZ9939 데이터시트, 핀배열, 회로
OZ9939www.DataSheet4U.com
LCDM Inverter Controller
FEATURES
Negative PWM dimming polarity
Constant operating frequency
Drives positive/negative-impedance lamps
during ignition
High drive current for external MOSFETs
User-defined ignition time and shutdown
delay time
Multiple mode dimming control
Built-in intelligence for ignition and normal
operation of CCFLs
Built-in open-lamp protection and over-
voltage protection for backlight system
Optimized soft-start function
ORDERING INFORMATION
Part
Number
OZ9939G
OZ9939GN
OZ9939IG
OZ9939IGN
OZ9939D
OZ9939DN
Temp Range
-20oC to 85oC
-20oC to 85oC
-40oC to 85oC
-40oC to 85oC
-20oC to 85oC
-20oC to 85oC
Package
16-pin SOIC
16-pin SOIC
Lead-Free
16-pin SOIC
16-pin SOIC
Lead-Free
16-pin DIP
16-pin DIP
Lead-Free
GENERAL DESCRIPTION
The OZ9939 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
waveforms.
The OZ9939 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
PWM or analog dimming functions).
The control logic provides a regulated ignition
voltage and appropriate protection features for
over-voltage or over-current conditions.
The OZ9939 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.
PIN DIAGRAM
SIMPLIFIED APPLICATION
CIRCUIT
10/27/2005
OZ9939-DS-1.1
Copyright © 2005 by O2Micro
All Rights Reserved
Patent#6,559,606, #6,856,519 & #6,809,93811
Page 1
CONFIDENTIAL




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