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.
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| Topology | Active-clamp forward |
| Control mode | Current |
| Duty cycle (max) (%) | 76 |
| Switching frequency (max) (kHz) | 2000 |
| Features | Current limiting, High-voltage startup, Soft start, Supports PFET clamp, Synchronization pin |
| UVLO thresholds on/off (V) | Programmable/1.25V |
| Operating temperature range (°C) | -40 to 125 |
| Rating | Catalog |
| Gate drive (typ) (A) | 2.5 |
| Vin (max) (V) | 15 |
| TSSOP (PW) | 20 | 41.6 mm² 6.5 x 6.4 |