LM5021MM-1/NOPB Power Path Management IC AC/DC Converters AC-DC Crnt Mode PWM Cntlr
power management integrated circuit
,microchip battery management
LM5021MM-1/NOPB Power Path Management IC AC/DC Converters AC-DC Crnt Mode PWM Cntlr
1 Features
- Ultra-low Startup Current (25 μA Maximum)
-
Current Mode Control
-
Skip Cycle Mode for Low Standby Power
-
Single Resistor Programmable Oscillator
-
Synchronizable Oscillator
-
Adjustable Soft-Start
-
Integrated 0.7-A Peak Gate Driver
-
Direct Opto-Coupler Interface
-
Maximum Duty Cycle Limiting (80% for LM5021-1 or 50% for LM5021-2)
-
Slope Compensation (LM5021-1 Only)
-
Undervoltage Lockout (UVLO) with Hysteresis
-
Cycle-by-Cycle Overcurrent Protection
-
Hiccup Mode for Continuous Overload Protection
-
Leading Edge Blanking of Current Sense Signal
-
Packages: VSSOP-8 or PDIP-8
2 Applications
-
DCM/CCM Flyback Converters
-
Industrial Power Conversion
-
SMPS for Smart Meters and Audio Amplifiers
-
Building Automation and White Goods SMPS
-
Isolated Telecom Power Supplies
3 Description
The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-ended flyback and forward power converters using current- mode control. The LM5021 features include an ultra- low (25 μA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, and so forth). Additional features include under-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope compensation, soft-start and oscillator synchronization capability. This high performance 8- pin IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator that is programmed with a single resistor.
Device Information
|
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
|
LM5021 |
VSSOP (8) |
3.00 mm × 3.00 mm |
|
PDIP (8) |
9.81 mm × 6.35 mm |
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