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LM5021-1QDGKRQ1 数据表(PDF) 1 Page - Texas Instruments

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部件名 LM5021-1QDGKRQ1
功能描述  LM5021-Q1 AC-DC Current-Mode PWM Controller
Download  34 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LM5021-1QDGKRQ1 数据表(HTML) 1 Page - Texas Instruments

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VOUT
VIN
CS
SS
OUT
FEEDBACK
WITH
ISOLATION
COMP
GND
RT
VCC
LM5021
90 ~ 264 Vac
+
+
AC
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM5021-Q1
SNVSA90 – DECEMBER 2014
LM5021-Q1 AC-DC Current-Mode PWM Controller
1 Features
2 Applications
1
Qualified for Automotive Applications
DCM/CCM Flyback Converters
AEC-Q100 Qualified With the Following Results:
Industrial Power Conversion
SMPS for Smart Meters and Audio Amplifiers
Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
Building Automation and White Goods SMPS
Device HBM Classification Level 2: ±2 kV
Isolated Telecom Power Supplies
Device CDM Classification Level C4B: 750 V
3 Description
Ultra-low Startup Current (25 µA Maximum)
The LM5021 off-line pulse width modulation (PWM)
Current Mode Control
controller contains all of the features needed to
Skip Cycle Mode for Low Standby Power
implement
highly
efficient
off-line
single-ended
Single Resistor Programmable Oscillator
flyback and forward power converters using current-
mode control. The LM5021 features include an ultra-
Synchronizable Oscillator
low (25 µA) start-up current, which minimizes power
Adjustable Soft-Start
losses in the high voltage start-up network. A skip
Integrated 0.7-A Peak Gate Driver
cycle mode reduces power consumption with light
loads for energy conserving applications (ENERGY
Direct Opto-Coupler Interface
STAR®, CECP, and so forth). Additional features
Maximum Duty Cycle Limiting (80% for LM5021-1
include under-voltage lockout, cycle-by-cycle current
or 50% for LM5021-2)
limit,
hiccup
mode
overload
protection,
slope
Slope Compensation (LM5021-1 Only)
compensation,
soft-start
and
oscillator
synchronization capability. This high performance 8-
Undervoltage Lockout (UVLO) with Hysteresis
pin IC has total propagation delays less than 100 ns
Cycle-by-Cycle Overcurrent Protection
and a 1-MHz capable oscillator that is programmed
Hiccup Mode for Continuous Overload Protection
with a single resistor.
Leading Edge Blanking of Current Sense Signal
Device Information(1)
Package: VSSOP-8
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM5021-Q1
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Application Diagram
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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