LM5032 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – High Voltage Dual Interleaved Current Mode Controller

March 2005
LM5032
High Voltage Dual Interleaved Current Mode Controller
General Description
The LM5032 dual current mode PWM controller contains all
the features needed to control either two independent for-
ward dc/dc converters or a single high current converter
comprised of two interleaved power stages. The two control-
ler channels operate 180˚ out of phase thereby reducing
input ripple current. The LM5032 includes a startup regulator
that operates over a wide input range up to 100V and
compound (bipolar + CMOS) gate drivers that provide a
robust 2.5A peak sink current. The adjustable maximum
PWM duty cycle reduce stress on the primary side MOSFET
switches. Additional features include programmable line
under-voltage lockout, cycle-by-cycle current limit, hiccup
mode fault operation with adjustable response time, PWM
slope compensation, soft-start, and a 2 MHz capable oscil-
lator with synchronization capability.
Features
n Two independent PWM current mode controllers
n Integrated high voltage startup regulator
n Compound 2.5A main output gate drivers
n Single resistor oscillator setting to 2 MHz
n Synchronizable oscillator
n Programmable maximum duty cycle
n Maximum duty cycle fold-back at high line voltage
n Adjustable timer for hiccup mode current limiting
n Integrated slope compensation
n Adjustable line under-voltage lockout
n Independently adjustable soft-start (each regulator)
n Direct interface with opto-coupler transistor
n Thermal shutdown
Applications
n Telecommunication Power Converters
n Industrial Power Converters
n +42V Automotive Systems
Packages
n TSSOP-16
Typical Application Circuit
Dual Interleaved Regulators with Independent Outputs
20135001
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