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See Technical Specifications

L5991D

Current Mode PWM

Manufacturer:

STMicroelectronics, Inc
Mfr.Part #:

L5991D
Datasheet:

L5991D Datasheet (PDF)
Output Isolation:

Isolated
Internal Switch(s):

No
Topology:

Boost, Flyback
Voltage - Start Up:

15 V
EDA/CAD Models:

Request Free CAD Models for L5991D

Email: [email protected]

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Tel: +852 95804164

L5991D General 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.

Key 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)

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)AC DC Converters, Offline Switches	Series	-
Output Isolation	Isolated	Internal Switch(s)	No
Voltage - Breakdown	-	Topology	Boost, Flyback
Voltage - Start Up	15 V	Voltage - Supply (Vcc/Vdd)	10V ~ 20V
Duty Cycle	93%	Frequency - Switching	Up to 1MHz
Fault Protection	Current Limiting, Over Voltage	Control Features	Frequency Control, Soft Start, Sync
Operating Temperature	-40°C ~ 150°C (TJ)	Mounting Type	Surface Mount
Base Product Number	L5991	feature-type	Current Mode PWM Controller
feature-maximum-power-dissipation-mw	830	feature-packaging	Tube
feature-rad-hard		feature-pin-count	16
feature-cecc-qualified	No	feature-esd-protection
feature-escc-qualified		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc	No
feature-svhc-exceeds-threshold	No

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Ratings and Reviews

V**a 11/18/2023

In tyumen, the order was a month and a half, the seller extended the protection of the order for 62 days, thanks to him, the leds are bright, i use to repair flashlights, the seller recommend and wish him success in his work.

B**n 11/15/2022

The parcel reached belarus in 17 days was not tracked. the order is satisfied. the seller and i recommend the product.