IRPLLED1 International Rectifier, IRPLLED1 Datasheet - Page 20

• Manufacturer Part Number: IRPLLED1
• Description: BOARD EVALUATION FOR IRS2540PBF
• Manufacturer: International Rectifier

Specifications of IRPLLED1

• Current - Output / Channel: 1.5A
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 24V
• Features: Dimmable
• Voltage - Input: 50 ~ 170V
• Utilized Ic / Part: IRS2540PBF
• Core Chip: IRS2540, IRS2541, IRS25401
• Topology: Buck (Step Down)
• No. Of Outputs: 1
• Output Current: 1.5A
• Output Voltage: 500mV
• Dimming Control Type: PWM
• Development Tool Type: Hardware - Eval/Demo Board
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption

output stage, such that output current spikes are reduced or eliminated. The presence of such current spikes may
cause the inductor to hum or buzz where the emitted sound will be that of the dimming frequency. The inrush of
current produces mechanical movement in the inductor due to the change in magnetic field, which can be heard
since the PWM signal is within the audible range of the human ear. The effects of adding in Rout can be seen in
Fig. 25 – 28.
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Fig. 26 Load Current Ripple Excluding Rout
Fig. 25 Load Current Spike Excluding Rout
Iout = 350mA, Vin = 100V, Vout = 17V
Iout = 350mA, Vin = 100V, Vout = 17V
RD-0608
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