L5991 Current Mode PWM
This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control.
Based on a standard current mode PWM controller this device includes some features such as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns leading edge blanking on current sense, pulse by pulse current limit, overcurrent protection with soft start intervention, and Standby function for oscillator frequency reduction when the converter is lightly loaded.
技术特性
- CURRENT-MODE CONTROL PWM
- SWITCHING FREQUENCY UP TO 1MHz
- LOW START-UP CURRENT (< 120µA)
- HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A)
- FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION
- PROGRAMMABLE DUTY CYCLE
- 100% AND 50% MAXIMUM DUTY CYCLE LIMIT
- STANDBY FUNCTION
- PROGRAMMABLE SOFT START
- PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY
- PWM UVLO WITH HYSTERESIS
- IN/OUT SYNCHRONIZATION
- LATCHED DISABLE
- INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE
- PACKAGE: DIP16 AND SO16
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功能框图
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L5991 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| L5991D013TR |
Active |
|
1000 |
SO-16 |
Tape And Reel |
|
|
| L5991AD13TR |
Active |
|
1000 |
SO-16 |
Tape And Reel |
|
|
| L5991D |
Active |
|
1000 |
SO-16 |
Tube |
|
|
| L5991AD |
Active |
|
1000 |
SO-16 |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| L5991 : DS1231: PRIMARY CONTROLLER WITH STANDBY |
16 |
411KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN1049: Minimize power losses of lightly loaded flyback converters with the L5991 PWM controller |
6 |
278KB |
| AN1215: How to handle short circuit conditions with ST's advanced PWM controllers |
1 |
63KB |
| AN2131: HIGH POWER 3-PHASE AUXILIARY POWER SUPPLY DESIGN BASED ON L5991 AND ESBT STC08DE150 |
1 |
854KB |
| AN2623: Evaluation board for off-line forward converter based on L5991 |
1 |
1269KB |
| AN1537: A simple trick enhances l5991’s standby function |
2 |
302KB |
| AN1686: AN L5991-based converter with temporary extra power capability |
1 |
91KB |
| AN1132: 90W SMPS for monitors with standby function |
4 |
191KB |
| AN1842: 60W WIDE-RANGE POWER SUPPLY FOR LCD MONITOR OR TV, USING THE L5991 |
2 |
816KB |
| AN1134: 45W AC-DC adapter with standby function |
4 |
193KB |
| AN1621: 300W secondary controlled two-switch forward converter with L5991A |
2 |
114KB |
| AN2439: 27W Output power ultra wide range input flyback converter |
1 |
422KB |
| AN1620: 25W off-line autoranging battery charger with L5991A |
1 |
57KB |
