| Topology | Active-Clamp Forward, |
| Duty cycle (Max) (%) | 76 |
| Vin (Max) (V) | 15 |
| UVLO thresholds on/off (V) | Programmable/1.25V |
| Features | Current Limiting, HV Start-up, Soft Start, Supports PFET Clamp, Synchronization Pin |
| Operating temperature range (C) | -40 to 125 |
| Switching frequency (Max) (kHz) | 2000 |
| Rating | Catalog |
| Gate drive (Typ) (A) | 2.5 |
- Two Independent PWM Current Mode Controllers
- Integrated High Voltage Startup Regulator
- Compound 2.5A Main Output Gate Drivers
- Single Resistor Oscillator Setting to 2 MHz
- Synchronizable Oscillator
- Active Clamp Gate Driver for P-Channel MOSFETs
- Adjustable Gate Drive Overlap Time
- Programmable Maximum Duty Cycle
- Maximum Duty Cycle Fold-Back at High Line Voltage
- Adjustable Timer for Hiccup Mode Current Limiting
- Integrated Slope Compensation
- Adjustable Line Under-Voltage Lockout
- Independently Adjustable Soft-Start (Each Regulator)
- Direct Interface with Opto-Coupler Transistor
- Thermal Shutdown
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The LM5034 dual current mode PWM controller contains all the features needed to control either two independent forward/active clamp dc/dc converters or a single high current converter comprised of two interleaved power stages. The two controller channels operate 180° out of phase thereby reducing input ripple current. The LM5034 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 dead-time of the active clamp gate drivers and 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 restart delay, PWM slope compensation, soft-start, and a 2 MHz capable oscillator with synchronization capability.
