IRPLLED1A International Rectifier, IRPLLED1A Datasheet - Page 9

• 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 output capacitor can be used simultaneously to reduce the frequency and improve current control accuracy. Fig.
11 shows how the capacitance reduces the frequency over a range of input voltage. A capacitance of 4.7uF has a
large effect on reducing the frequency. Fig. 12 shows how the current regulation is also improved with the output
capacitance. There is a point at which continuing to add capacitance no longer has a significant effect on the
operating frequency or current regulation, as can be seen in Fig. 12 and Fig. 13.
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1000
100
390
380
370
360
350
340
330
10
30
30
Fig. 11 Iout = 350mA, Vout = 16.8V, L = 470uH
Fig. 12 Iout = 350mA, Vout = 16.8V, L = 470uH
50
70
RD-0608
80
90
Vin (V)
Vin (V)
110
130
130
150
170
0uF
4.7uF
10uF
22uF
33uF
47uF
0uF
4.7uF
10uF
22uF
33uF
47uF
180
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