ISL6551IR-T Intersil, ISL6551IR-T Datasheet - Page 22

• Manufacturer Part Number: ISL6551IR-T
• Description: IC CTRL PWM ZVS FULL BRDG 28-QFN
• Manufacturer: Intersil

Specifications of ISL6551IR-T

• Pwm Type: Current Mode
• Number Of Outputs: 6
• Frequency - Max: 1MHz
• Duty Cycle: 50%
• Voltage - Supply: 10.8 V ~ 13.2 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Frequency-max: 1MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Primary FET Drivers
(1) PUSH-PULL DRIVERS
Push-Pull Medium Current Drivers - Upper drivers are not
used. No external drivers are required. Secondary control.
Operate at the switching frequency.
Push-Pull High Current Drivers - Upper drivers are not
used. External high current drivers are required and less
power is dissipated in the ISL6551 controller. Secondary
control. Operate at the switching frequency.
Push-Pull Primary Control - Upper drivers are not used.
Both lower drivers can directly drive the power switches.
External drivers are required in high gate capacitance
applications.
FIGURE 23A. PUSH-PULL MEDIUM CURRENT DRIVERS
LOWER1
LOWER2
22
FIGURE 23C. PUSH-PULL PRIMARY CONTROL
Q3_S
Q4_S
Q3_G
Q4_G
LOWER2
LOWER1
PGND
ISL6551
HIP2100IB
HI
LI
VSS
LOWER1
LOWER2
HO
HS
LO
FIGURE 23B. PUSH-PULL HIGH CURRENT DRIVERS
Q3_S
Q3_G
Q4_G
Q4_S
VSS
HI
LI
HIP2100IB
HO
HS
LO
January 3, 2006
FN9066.5
Q3_G
Q3_S
Q4_G
Q4_S