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OZ9938 Datasheet PDF - O2 Micro

Part Number OZ9938
Description LCDM Inverter Controller
Manufacturers O2 Micro 
Logo O2 Micro Logo 

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Total ( 12 pages )



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CHANGES
No. Applicable Section
1. Electrical Characteristics
2. Throughout datasheet
OZ9938
Change Summary
Description
Update rotection release threshold in ‘Timer & protection’
parameter Min & Max limits
Miscellaneous changes
Page(s)
3
---
REVISION HISTORY
Revision No.
0.60
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
1. Ordering Information: Add OZ9938G, IG, D & DN. 2. Recommended
Operating Range: a. Add ‘Dimming Range’; b. Fill in ‘Thermal Impedance’.
3. Electrical Characteristics: a. Update ‘Supply Current’ limits; b. Update
‘Soft Start’ limits; c. Update ‘Under Voltage Lockout’ limits; d. Update
‘Reference Voltage’ limits; e. Update ‘Driver Frequency’ limits; f. Update
‘Timer & Protection’ limits; g. Update ‘Drivers’ parameter name & limits; h.
Update ‘PWM Dimming Control’ limits; i. Delete ‘Analog Dimming Control’.
4. Function Description: Update formula in NO. 4 Ignition, No. 6 Normal
Operation & No. 9 Dimming Control. 5. Package Information: Add DIP
package drawing.
Release Date
5/12/2005
6/27/2005
9/22/2005
10/14/2005
OZ9938-DS-1.1
Copyright 2005 by O2Micro
All Rights Reserved
Patent#6,559,606, #6,856,519 & #6,809,938
www.DataSheet4U.net
Page 0
CONFIDENTIAL

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OZ9938 equivalent
OZ9938
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
PWM Dimming Control
LCT frequency
ENA Threshold
On
Off
Symbol
Test Conditions
Limits
VDDA=5V; Ta=25 oC
RCT =39Kohm, CCT=470pF
RLCT =3.3Mohm, CLCT=4.7nF
Min
Typ Max
Unit
194 200 206
Hz
2.0 V
1.0 V
CONFIDENTIAL
OZ9938-DS-1.1
Page 4


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