Product overview
Description
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.
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All features
- PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY
- PROGRAMMABLE SOFT START
- IN/OUT SYNCHRONIZATION
- PWM UVLO WITH HYSTERESIS
- INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE
- LATCHED DISABLE
- PACKAGE: DIP16 AND SO16
- 100% AND 50% MAXIMUM DUTY CYCLE LIMIT
- PROGRAMMABLE DUTY CYCLE
- CURRENT-MODE CONTROL PWM
- LOW START-UP CURRENT (< 120µA)
- SWITCHING FREQUENCY UP TO 1MHz
- FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION
- STANDBY FUNCTION
- HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A)
Circuit Diagram
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STMicroelectronics - L5991
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L5991AD | Active | SO-16 | Industrial | Ecopack2 | |
| L5991AD13TR | Active | SO-16 | Industrial | Ecopack2 | |
| L5991D | Active | SO-16 | Industrial | Ecopack2 | |
| L5991D013TR | Active | SO-16 | Industrial | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L5991AD13TR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| L5991D | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| L5991AD | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| L5991D013TR | | | distributors No availability of distributors reported, please contact our sales office |
L5991AD13TR Active
L5991D Active
L5991AD Active
L5991D013TR Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors