The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.
|Part number||Order||Topology||Control method||VCC (Min) (V)||VCC (Max) (V)||Frequency (Max) (kHz)||UVLO thresholds on/off (V)||Duty cycle (Max) (%)||Gate drive (Typ) (A)||Features||Rating||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)|
|Catalog||-40 to 125||
HTSSOP | 28
WQFN | 28
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
28WQFN: 25 mm2: 5 x 5 (WQFN | 28)