Change Summary Controlled Recipient #101461 printed 10/25/2004. U

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Change Summary Controlled Recipient #101461 printed 10/25/2004. U

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OZ964
Change Summary
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
CHANGES
Applicable Section Title Ordering Information General Description Functional Block Diagram Description Reference Application Circuit Package information Throughout data sheet Description Change title read `Phase-Shift Controller' OZ964GN, OZ964IG, OZ964IGN, OZ964D OZ964DN paragraph `OZ964 high.LCD.' paragraph sentence `Specific DC/CD.' DC/DC Reference Application Circuit Correct SOIC 300mil drawing Miscellaneous corrections
Page(s)
REVISION HISTORY
Revision 0.95 0.96 Description change Initial Release Ordering information: OZ964SN OZ964ISN. Description: modified description CTIMR, DIM. Electrical Characteristics: revise `Nominal Voltage' limit, `Normal Operating Frequency' limit, `Ramp Peak' limit, `Operating Frequency' limit, `Negative-Going Threshold Voltage' limit, `SST Current' limit, `CTIMR Current limit, `Protection Release Threshold' limit, `PDR_A/ PDR_C' Typ`limit, `Enable' limit, `NDR_B/ NDR_D' limit, `BBM Time Between NDR' limit, `Minimum Overlap' limit. Simplified Functional Block Diagram. Modified formula Ignition Normal Operation Functional Information. Revise Application Circuit. Miscellaneous corrections. Electrical Characteristics: Fill limits parameters Correct `SST Protection Release Threshold' limit. Application Circuit: Correct 6.8n, 28:2200. Miscellaneous corrections. Footer: patent number 6,259,615 Application circuit: Delete R11. Change value from 45.3k Release Date 1/13/2004 3/19/2004
4/5/2004
7/29/2004
09/03/04 Copyright 2004 O2Micro
OZ964-DS-1.2 Rights Reserved
Page U.S. Patent 6,259,615 CONFIDENTIAL
OZ964
Phase-Shift Controller
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
FEATURES
Controller high-voltage DC/DC DC/AC converters High efficiency, zero-voltage switching Supports wide input voltage range Constant operating frequency Built-in dimming control with wide dimming range Soft start function Built-in intelligence ignition normal operation CCFLs Built-in open-lamp protection overvoltage protection Shutdown delay input voltage brownout condition Built-in under-voltage lockout protection Toggle reset after shutdown stand-by power OZ964 operates zero-voltage switching mode that minimizes electromagnetic interference (EMI). addition, OZ964 achieves high power-conversion efficiency resulting lower operating temperature higher system reliability. OZ964 supports wide input voltage range provides constant, user-defined, operating frequency, ensuring that CCFLs operate fixed frequency. This eliminates interference among CCFLs panel. Interference causes electromagnetic compatibility (EMC) problems create visual effects (waterfall) panels. controller provides phase-shift square wave output that able drive full bridge power train. OZ964 utilizes pulse width modulation (PWM) dimming method achieve wide dimming range. performs CCFL dimming function with analog frequency control. frequency user-defined. avoid over-shoot in-rush current CCFLs during ignition, soft start function provided reliable CCFL operation. controller provides open-lamp protection over-voltage protection, while providing appropriate response either open-lamp ignition removal CCFL during normal operation. Intelligent open-lamp protection over voltage protection provides design flexibility with various transformer characteristics. Openlamp protection time user-defined. addition, OZ964 provides shutdown delay function that will keep inverter module normal operation short period time input voltage suddenly drops subsequently resumes normal level. shutdown delay time user-defined. OZ964 provides under-voltage lockout protection will disable VDDA falls below threshold. OZ964 will resume normal operation when VDDA exceeds threshold. reset toggle enable (ENA) pin. OZ964 operates with standby current approximately 200uA.
ORDERING INFORMATION
Part Number OZ964S OZ964SN OZ964IS OZ964ISN OZ964G OZ964GN OZ964IG OZ964IGN OZ964D OZ964DN Temp Range
-40° +85°C -40° +85°C -40° +85°C -40° +85°C
Package 20-pin SSOP 20-pin SSOP, Leadfree 20-pin SSOP 20-pin SSOP, Leadfree 20-pin SOIC 20-pin SOIC, Leadfree 20-pin SOIC 20-pin SOIC, Leadfree 20-pin PDIP 20-pin PDIP, Leadfree
GENERAL DESCRIPTION
OZ964 high efficiency, Pulse Width Modulation (PWM) controller designed both DC/DC DC/AC high-voltage applications. average current mode control suitable DC/DC converters where both voltage current feedback required, well Cold Cathode Fluorescent Lamp (CCFL)_ backlight applications small large Liquid Crystal Displays (LCD).
09/03/04 Copyright 2004 O2Micro
OZ964-DS-1.2 Rights Reserved
Page U.S. Patent 6,259,615 CONFIDENTIAL
OZ964
DESCRIPTION
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
Names CTIMR VDDA GNDA NDR_D PDR_C LPWM PGND PDR_A NDR_B
Description Timing capacitor provide striking time timing resistor provide shutdown delay time Voltage feedback Enable input Timing capacitor provide Soft-Start Time Supply voltage Signal ground Reference voltage output Timing resistor provide striking frequency Current sense feedback Voltage control loop compensation N-MOSFET gate drive output P-MOSFET gate drive output Low-frequency signal dimming control voltage input LPWM duty cycle Timing capacitor provide LPWM frequency Power MOSFET driver ground Timing resistor provide striking operating frequency Timing capacitor provide striking operating frequency P-MOSFET gate drive output N-MOSFET gate drive output
ABSOLUTE MAXIMUM RATINGS(1)
VDDA GNDA, PGND Signal inputs Operating Temp. 7.0V 0.3V -0.3V (VDDA +0.3)V OZ964 70oC OZ964I -40oC +85oC
Operating junction temp. Storage temp.
RECOMMENDED OPERATING RANGE
VDDA fOP- operating frequency Resistor connected (RRT) Capacitor connected (CCT) fLF- LPWM frequency Thermal Impedance (J-A) 20-pin SSOP 20-pin SOIC 4.6V 5.5V 150kHz(2) 100pF 470pF 100Hz 500Hz
Note (1): "Absolute Maximum Ratings" those values beyond which safety device cannot guaranteed. device should operated these limits. "Functional Specifications" table will define conditions actual device operation. Exposure absolute maximum rated conditions extended periods affect device reliability. Note (2): frequency PDR_A, NDR_B, PDR_C, NDR_D outputs pulses, fOP, half fosc value, =(fosc/2).
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
ELECTRICAL CHARACTERISTICS
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
Parameter
Symbol
Test Conditions VDDA=5V; Tamb=25
Limits
Unit
Reference Voltage Nominal voltage Vref Iload 30µA Temp coefficient (Tamb=25 Line regulation Load regulation Operating Frequency Normal Operating Frequency VDDA=4.6V 5.5V Iload =220pF =47k
3.22
3.35
3.48
ppm/ mV/V
61.5 2.35 1.00
63.0 2.50 1.05 2.06 0.31
65.5 2.65 1.12 2.18 0.33
ppm/ ppm/
Temp coefficient (Tamb=25 Ramp peak Ramp valley Frequency Oscillator Operating frequency Vpeak Vvalley
CLCT=6.8nF(2); VDIM=1.2V Temp coefficient (Tamb=25
1.96 0.27
Ramp peak Ramp valley Duty Cycle Range Error Amplifier Reference voltage noninverting input (internal) Under-Voltage Lockout Positive-Going Threshold Voltage Negative-Going Threshold Voltage Supply Stand-by Current Supply Current
Vpeak Vvalley LPWM
VADJ
VSST=0V VSST=2V VSST=4V
0.49 0.79 1.19
0.50 0.80 1.24
0.55 0.81 1.29
IOFF
ENA=low DIM=1.2V; LPWM=50k Ca=Cb=Cc=Cd=0.5nF =220pF =47k
;CLCT=6.8nF
Soft Start current Temp coefficient (Tamb=25 Protection Release Threshold CTIMR CTIMR current Temp coefficient (Tamb=25 CTIMR current Protection release threshold VDDA -1.25 VDDA -1.0 VDDA -0.93
ppm/
ppm/
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
ELECTRICAL CHARACTERISTICS (CONTINUED)
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
Parameter Output Driver Rds(on) PDR_A PDR_C NDR_B NDR_D Enable Thresholds Enable Disable Over-Voltage Protection Threshold Voltage Open-Lamp Protection Threshold Open-Lamp Threshold Break-Before-Make (BBM) Time Between
Symbol
Test Conditions VDDA=5V; Tamb=25 Sourcing=75mA Sinking=75mA
Limits 2.00 2.20
Unit
CMP> open-lamp threshold causes shutdown
1.95
2.54
2.70
2.82
Temp coefficient (Tamb=25
ppm/
Maximum Minimum Duty Cycle Maximum Overlap Minimum Overlap Vsst 3.75V Vcmp 3.24V Vsst 0.8V Vcmp 3.5V Note CCT: capacitor from "CT" (Pin ground RRT: resistor from "RT" (Pin ground Note CLCT: capacitor from "LCT" (Pin ground Note capacitor from PDR_A (Pin VDDA capacitor from NDR_B (Pin ground capacitor from PDR_C (Pin VDDA capacitor from NDR_D (Pin ground
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
FUNCTIONAL BLOCK DIAGRAM DESCRIPTION
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
Specific DC/DC applications shown with Reference Application Circuit Figure page following discussions will address OZ964 driving DC/AC CCFL application. Refer Functional Block Diagram Figure page Reference Application Circuit Figure page drive circuit consists four outputs, PDR_A, NDR_B, PDR_C NDR_D, (pins respectively. drive circuit designed achieve high efficiency, zero-voltage switching operation. four power MOSFET gate output drives, PDR_A, NDR_B, PDR_C NDR_D designed such that switches QA/QB QC/QD never turn-on simultaneously. configuration prevents shoot-through issues associated with bridge-type power conversion applications. CCFL current regulation achieved adjusting overlap conduction between diagonal switches QA/QD QB/QC. overlap adjusted when power source voltage varies. Reference Block provides precision reference voltage both internal external uses. OZ964 enabled with voltage greater than applied (pin voltage less than will disable controller. Toggling (pin from High-Low-High will reset controller. Soft-start circuitry provides gradual increase power drive circuit power CCFLs during ignition period. Soft-Start Time (SST) user-defined external capacitor connected (pin coupled with current source 5.5uA. High Frequency Oscillator Block generates user-defined operating frequency determined external capacitor (C5) timing resistor (R9) connected (pin (pin respectively. external resistor (R10) connected (pin parallel with determines striking frequency. current control loop monitors CCFL current that sensed with voltage (pin voltage (pin input Error Amplifier output, (pin 10), regulates CCFL current. OZ964 provides Over-Voltage Protection (OVP) function safely operate CCFLs under conditions. Block regulates striking voltage CCFL during start-up. striking time user-defined determined external capacitor connected CTIMR (pin coupled with CTIMR current source 2.6uA. CONFIDENTIAL
Protection Block intelligently monitors differentiates striking condition openlamp condition. open-lamp protection function disables drive circuit fault condition encountered. current source 30uA coupled with external capacitor external resistor connected controls shutdown delay time. shutdown delay time will keep inverter module normal operation short period time input voltage suddenly drops subsequently increases normal level. shutdown delay time user-defined. Under-Voltage Lockout block provides brown-out period during which output signals disabled while VDDA voltage drops below ~3.4V threshold. OZ964 resumes normal operation once VDDA voltage reaches voltage threshold greater than ~4.3V. LPWM Generator Block provides frequency (LPWM) function that provides wide dimming control CCFLs. LPWM frequency user-defined connecting external capacitor (pin 15). analog voltage (pin compared with waveform that yields LPWM signal control power delivered CCFLs.
OZ964-DS-1.2
Page
OZ964
FUNCTIONAL BLOCK DIAGRAM
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
Fault Protection Logic
Phase Shift Driver V-REF I-BIAS
Control Logic
Figure
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
FUNCTIONAL INFORMATION
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
Steady-State Operation
Referring example schematic shown Figure page OZ964 drives full-bridge power train where transformer couples energy from power supply source CCFL. switches bridge denoted configured such that transistors each pair, QA/QB QC/QD, turned-on complementarily. turn-on duration diagonal switches, QA/QD QB/QC, simultaneously determines amount energy delivered transformer subsequently CCFL. current CCFL sensed regulated adjusting turn-on time (overlap) both diagonal switches. This accomplished through error amplifier current feedback loop. voltage loop used regulate output voltage CCFL ignition programmable using capacitor divider (C8/C13). Over Voltage Protection (OVP) limits transformer voltage under open-lamp condition. soft-start circuit ensures gradual increase power CCFL. soft-start capacitor (C9) determines rate rise voltage pin. Meanwhile, voltage level determines turn-on time diagonal switches QA/QD QB/QC. output drives power MOSFET gates include PDR_A, NDR_B, PDR_C NDR_D that output complementary square pulse. operation four switches implemented with zero-voltage switching that provides highefficiency power conversion.
voltage (pin greater than soft-start time determined external capacitor (C9) connected (pin start-up, charges charging current, voltage level capacitor controls gradual increase power delivered transformer
Ignition
OZ964 provides option selecting different frequency striking CCFLs. striking time user-defined determined external capacitor CCTIMR (C6) external resistor RCTIMR (R5) connected CTIMR (pin approximate striking time determined following equation. T[second]
CCTIMR[µF] (3-(RCTIMR[k] 0.0026))
approximate striking frequency determined following equation.
fstriking[kHz]
RRT1)
Note: RRT1 means parallel with RRT.1.
Normal Operation
Once enabled, voltage (pin controls rate power delivered load. voltage increases level such that CCFLs ignited. striking frequency determined external components R10, connected (pin (pin (pin respectively. Once external resistor senses sufficient current, control loop takes control regulates CCFL current. normal operating frequency determined combination external resistor external capacitor operating frequency approximated following equation.
Enable
OZ964 enabled when voltage (pin greater than voltage less than disables When inverter controller disabled, draws approximately 200uA. under-voltage lockout protection feature provided that will disable VDDA voltage drops below ~3.4V threshold. will resume normal operation once VDDA reaches threshold voltage greater than ~4.3V.
fop[kHz]
Soft-Start
avoid component stresses in-rush current CCFLs during ignition, soft start function implemented provide reliable CCFL operation. soft-start function initiated when
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
Open Lamp Protection
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
controller encounters open lamp, damaged lamp lamp removal during normal operation, control loop generates protection signal will immediately shutdown controller. OZ964 provides shutdown delay feature that keeps inverter module normal operation input voltage suddenly drops subsequently recovers. shutdown delay time user-defined external resistor RCTIMR (R5) external capacitor CCTIMR (C6) connected CTIMR (pin shutdown delay time approximated following equation:
CCTIMR[µF] (RCTIMR 0.03))
Over-Voltage Protection Striking Time
During start-up, once voltage transformer secondary reaches programmed threshold, control loop takes over regulates voltage transformer secondary. voltage held constant CTIMR activated provide additional time ignite aged CCFL. current sensed after approximately seconds, controller shuts down. Toggling will reset controller.
Dimming Control
OZ964 provides frequency (LPWM) dimming function perform wide dimming range 100%. LPWM frequency determined external capacitor connected (pin 15). frequency approximated following equation.
1496
T[second]
Note: RCTIMR (R5) value equal greater than 110k will result zero delay time. Toggling (pin from High-Low-High resets controller.
LF[Hz]
CLCT[nF]
LPWM frequency user-defined selection external capacitor C10. analog voltage (pin compared with waveform that yields LPWM signal control power delivered CCFLs. typical peak valley waveform ~2.06V ~0.31V respectively.
CONFIDENTIAL
OZ964-DS-1.2
Page
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
REFERENCE APPLICATION CIRCUIT
OZ964
VIN: 8.0V VADJ: 2.1V Max. Brightness; 0.6V Min. Brightness Striking frequency: 75.1KHz Operating frequency: 63KHz 5VDC: 4.75V 5.25V
Figure
CONFIDENTIAL
OZ964-DS-1.2
Page
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
DC/DC REFERENCE APPLICATION CIRCUIT
OZ964
Figure
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
PACKAGE INFORMATION 20-PIN SSOP 150mil: OZ964S
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
Detail
0.10MM
SEATING PLANE
NOTES: DIMENSION DOES INCLUDE PROTRUSIONS GATE BURRS PROTRUSIONS GATE BURRS SHALL EXCEED SIDE
Gauge Plane 0.25MM
Detail
JEDEC
MILLIMETERS 1.35 1.63 1.75 0.10 0.15 0.25 1.50 0.20 0.30 0.18 0.25 0.635 BASIC 8.56 8.66 8.74 5.79 5.99 6.20 3.81 3.91 3.99 0.41 0.635 1.27 0.25 0.50 1.4732 0.20 0.33 0.20 MO-137 (AD)
BASIC
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
PACKAGE INFORMATION 20-PIN SOIC 300mil: OZ964G
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
NOTES:
SYMBOL
DETAIL
MILLIMETERS 2.36 2.54 2.64 0.10 0.20 0.30 0.35 0.406 0.48 0.23 0.254 0.31 12.60 12.80 13.00 7.40 7.50 7.60 1.27 10.00 10.31 10.65 0.25 0.66 0.75 0.51 0.76 1.02 0.075
CONFIDENTIAL
OZ964-DS-1.2
Page
OZ964
IMPORTANT NOTICE
Controlled Recipient #101461 printed 10/25/2004. Updates will provided registered recipients.
portion O2Micro specifications/datasheets subparts reproduced form, means, without prior written permission from O2Micro. O2Micro subsidiaries reserve right make changes their datasheets and/or products discontinue product service without notice, advise customers obtain latest version relevant information verify, before placing orders, that information being relied current complete. products sold subject terms conditions sale supplied time order acknowledgment, including those pertaining warranty, patent infringement, limitation liability. O2Micro warrants performance products specifications applicable time sale accordance with O2Micro's standard warranty. Testing other quality control techniques utilized extent O2Micro deems necessary support this warranty. Specific testing parameters each device necessarily performed, except those mandated government requirements. Customer acknowledges that O2Micro products designed, manufactured intended incorporation into systems products intended connection with life support other hazardous activities environments which failure O2Micro products could lead death, bodily injury, property environmental damage ("High Risk Activities"). O2Micro hereby disclaims warranties, O2Micro will have liability Customer third party, relating O2Micro products connection with High Risk Activities. support, assistance, recommendation information (collectively, "Support") that O2Micro provide (including, without limitation, regarding design, development debugging your circuit board other application) provided IS." O2Micro does make, hereby disclaims, warranties regarding such Support, including, without limitation, warranties merchantability fitness particular purpose, warranty that such Support will accurate error free that your circuit board other application will operational functional. O2Micro will have liability under legal theory connection with your reliance such Support. COPYRIGHT 2004, O2Micro International Limited
CONFIDENTIAL
OZ964-DS-1.2
Page

Change Summary Controlled Recipient #101461 printed 10/25/2004. U

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