L6591
ActivePWM CONTROLLER FOR ZVS HALF BRIDGE, 9.2V TO 22V SUPPLY, 500KHZ, 11.9V/0.8A OUT, NSOIC-16
Deep-Dive with AI
Search across all available documentation for this part.
L6591
ActivePWM CONTROLLER FOR ZVS HALF BRIDGE, 9.2V TO 22V SUPPLY, 500KHZ, 11.9V/0.8A OUT, NSOIC-16
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | L6591 |
|---|---|
| Control Features | Soft Start, Frequency Control |
| Duty Cycle | 50 % |
| Fault Protection | Over Load, Current Limiting |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Isolation | Isolated |
| Package / Case | 16-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 16-SO |
| Topology | Half-Bridge |
| Voltage - Start Up | 14 V |
| Voltage - Supply (Vcc/Vdd) [Max] | 22 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 8.7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
Description
General part information
L6591 Series
The L6591 is a double-ended PWM controller specific to the soft-switched half bridge topology. It provides complementary PWM control, where the high-side switch is driven ON for a duty cycle D and the low-side switch for a duty cycle 1-D, with D < 50%. An externally programmable deadtime inserted between the turn-off of one switch and the turn-on of the other one guarantees soft-switching and enables high-frequency operation.
To drive the high-side switch with the bootstrap approach, the IC incorporates a high-voltage floating structure able to withstand more than 600 V with a synchronous-driven high-voltage DMOS that replaces the external fast-recovery bootstrap diode.
The IC enables the user to set the operating frequency of the converter by means of an externally programmable oscillator: the maximum duty cycle is digitally clipped at 50% by a T-flip-flop, so that the operating frequency is half that of the oscillator.