LM5035C Texas instruments

LM5035C

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LM5035C

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Описание

The LM5035C half-bridge controller and gate driver contains all of the features necessary to implement half-bridge topology power converters using voltage mode control with line voltage feedforward. The LM5035C is a functional variant of the LM5035B half-bridge PWM controller. The amplitude of the SR1 and SR2 waveforms are 5 V instead of the VCC level. Also, the soft-stop function is disabled in the LM5035C. The LM5035, LM5035A, LM5035B, and LM5035C include a floating high-side gate driver, which is capable of operating with supply voltages up to 105 V. Both the high-side and low-side gate drivers are capable of 2-A peak. An internal high-voltage start-up regulator is included, along with programmable line undervoltage lockout (UVLO) and overvoltage protection (OVP). The oscillator is programmed with a single resistor to frequencies up to 2 MHz. The oscillator can also be synchronized to an external clock. A current sense input and a programmable timer provide cycle-by-cycle current limit and adjustable hiccup mode overload protection. The differences between LM5035, LM5035A, LM5035B, and LM5035C are summarized in the Device Comparison Table.

105-V and 2-A Half-Bridge Gate Drivers
Synchronous Rectifier Control Outputs With Programmable Delays
Reduced Dead Time Between High and Low-Side Drive for Higher Maximum Duty Cycle.
High Voltage (105 V) Start-Up Regulator
Voltage Mode Control With Line Feedforward and Volt Second Limiting
Resistor Programmed, 2-MHz Capable Oscillator
Programmable Line Undervoltage Lockout and Overvoltage Protection
Internal Thermal Shutdown Protection
Adjustable Soft Start
Versatile Dual Mode Overcurrent Protection With Hiccup Delay Timer
Cycle-by-Cycle Overcurrent Protection
Direct Opto-coupler Interface
Logic Level Synchronous Rectifier Drives
5-V Reference Output
Packages:
- HTSSOP-20 (Thermally Enhanced)
- WQFN-24 (4mm × 5mm)

Topology	Half bridge, Push pull
Control mode	Feedforward
Duty cycle (max) (%)	50
Switching frequency (max) (kHz)	2000
Features	Current limiting, High-voltage startup, Multi-topology, Pre-bias startup, Synchronization pin
UVLO thresholds on/off (V)	Programmable/1.25V
Operating temperature range (°C)	-40 to 125
Rating	Catalog
Gate drive (typ) (A)	2
Vin (max) (V)	15