IR3621FPBF International Rectifier, IR3621FPBF Datasheet - Page 24

• Manufacturer Part Number: IR3621FPBF
• Description: 2-Phase Dual Synchronous PWM Controller with Oscillator Synchronization and Pre-Bias Startup
• Manufacturer: International Rectifier

Specifications of IR3621FPBF

• Package: 28-Pin TSSOP
• Circuit: Dual Sync PWM Controller or 2Phase Single Output
• Vcc (min): 4.7
• Vcc (max): 16
• Vout (min): 0.8
• Vout (max): Vcc * 0.90
• Switch Freq (khz): programmable to 500kHz
• Pbf: PbF Option Available

IR3621 & (PbF)
TYPICAL OPERATING WAVEFORMS
Test Conditions:
V
=12V, V
=2.5V, I
=0-10A, V
=1.8V, I
=0-10A, Fs=400kHz, Ta=Room Temp, No Air Flow
IN
OUT1
OUT1
OUT2
OUT2
Unless otherwise specified.
Figure 30 - 1.8V output shorted
Figure 29 - 2.5V Waveforms
Ch1: Vo1, Ch2: SS2, Ch3: Inductor Current
Ch1: Hdrv2, Ch2: Ldrv2, Ch3: Lx2, Ch4: Inductor Current
Figure 32 - Prebias Start up
Figure 31 - 2.5V output shorted
Ch1: SS1, Ch2: Vo1, Ch3: SS2, Ch4:Vo2
Ch1: Vo2, Ch2: SS1, Ch3: Inductor Current
24
www.irf.com