Description
The ISL6752 is a high-performance, low-pin-count alternative zero-voltage switching (ZVS) full-bridge PWM controller. Like Intersils ISL6551, it achieves ZVS operation by driving the upper bridge FETs at a fixed 50% duty cycle while the lower bridge FETs are trailing-edge modulated with adjustable resonant switching delays. Compared to the more familiar phase-shifted control method, this algorithm offers equivalent efficiency and improved overcurrent and lightload performance with less complexity in a lower pin count package. The ISL6752 features complemented PWM outputs for synchronous rectifier (SR) control. The complemented outputs may be dynamically advanced or delayed relative to the PWM outputs using an external control voltage. This advanced BiCMOS design features precision deadtime and resonant delay control, and an oscillator adjustable to 2MHz operating frequency. Additionally, Multi-Pulse Suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.
The ISL6752 is a high-performance, low-pin-count alternative zero-voltage switching (ZVS) full-bridge PWM controller. Like Intersil’s ISL6551, it achieves ZVS operation by driving the upper bridge FETs at a fixed 50% duty cycle while the lower bridge FETs are trailing-edge modulated with adjustable resonant switching delays. Compared to the more familiar phase-shifted control method, this algorithm offers equivalent efficiency and improved overcurrent and light-load performance with less complexity in a lower pin count package. This advanced BiCMOS design features precision deadtime and resonant delay control, and an oscillator adjustable to 2MHz operating frequency. Additionally, Multi-Pulse Suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.
Key Features
Adjustable Resonant Delay for ZVS Operation
Synchronous Rectifier Control Outputs with Adjustable Delay/Advance
Current-Mode Control
3% Current Limit Threshold
Adjustable Deadtime Control
175µA Start-up Current
Supply UVLO
Adjustable Oscillator Frequency Up to 2MHz
Internal Over-Temperature Protection
Buffered Oscillator Sawtooth Output
Fast Current Sense to Output Delay
Adjustable Cycle-by-Cycle Peak Current Limit
70ns Leading Edge Blanking
Multi-Pulse Suppression
Pb-Free (RoHS Compliant)
Specifications
Manufacturer: Renesas Electronics
Product Category: Switching Controllers
Number of Outputs: 6 Output
Switching Frequency: 2000 kHz
Duty Cycle – Max: 99 %
Output Current: 100 mA
Minimum Operating Temperature: – 40 C
Maximum Operating Temperature: + 105 C
Mounting Style: SMD/SMT
Package / Case: QSOP-16
Packaging: Tube
Brand: Renesas / Intersil
Height: 1.47 mm
Length: 4.9 mm
Moisture Sensitive: Yes
Product Type: Switching Controllers
Series: ISL6752
Subcategory: PMIC – Power Management ICs
Type: Current Mode PWM Controllers
Width: 3.9 mm
Unit Weight: 0.002822 oz
Manufacturer Part Number: ISL6752AAZA
Manufacturer: Intersil
