IRPLLED1A International Rectifier, IRPLLED1A Datasheet - Page 10

• Manufacturer Part Number: IRPLLED1A
• Description: Power Management IC Development Tools Hi-Vlt DC-DC Buck Cnvr HBLED Cur Cntrl
• Manufacturer: International Rectifier
• Type: DC/DC Converters, Regulators & Controllersr

Specifications of IRPLLED1A

• Product: Power Management Development Tools
• Tool Is For Evaluation Of: IRS25401PBF
• Output Voltage: 16 V to 24 V
• Output Current: 350 mA to 1.5 A
• Factory Pack Quantity: 1

The addition of the COUT is essentially increasing the amount of energy that can be stored in the output stage,
which also means it can supply current for an increased period of time. Therefore by slowing down the di/dt
transients in the load, the frequency is effectively decreased.
With the COUT capacitor added to the circuit the inductor current is no longer identical to that seen in the load. The
inductor current has a triangular shape, where as the load will see the same basic trend in the current, but all sharp
corners become rounded with peaks significantly reduced, as can be seen in Fig. 14 and 13.
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Fig. 14 Iout = 350mA, Vin = 100V, Vout = 16.85V, L = 470uH, COUT = 33uF
400
350
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150
100
50
0
0
Fig. 13 Iout = 350mA, Vout = 16.8V, L = 470uH
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RD-0608
Capacitance (uF)
20
30
40
50
40V
100V
160V
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