IR3621FPBF International Rectifier, IR3621FPBF Datasheet - Page 23

• 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 26 - 1.8V output
Figure 25 - 2.5V output
Ch1: Vin, Ch2: SS2, Ch3: Vo2, Ch4: PGood
Ch1: Vin, Ch2: SS1, Ch3: Vo1, Ch4: PGood
Figure 27 - Gate waveforms with 180
o
Figure 28 - 2.5V Waveforms
out of phase
Ch1: Hdrv1, Ch2: Ldrv1, Ch3: Lx1, Ch4: Inductor Current
Ch1: Hdrv1, Ch2: Hdrv2
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