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BD9P1X5EFV-C 데이터시트(PDF) 18 Page - Rohm |
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BD9P1X5EFV-C 데이터시트(HTML) 18 Page - Rohm |
18 / 60 page 18/57 TSZ02201-0J1J0AL01480-1-2 © 2019 ROHM Co., Ltd. All rights reserved. 08.Apr.2020 Rev.002 www.rohm.com TSZ22111 • 15 • 001 BD9P1x5EFV-C Series Function Explanation 1. Nano Pulse Control TM Nano Pulse Control TM is an original technology developed by ROHM Co., Ltd. It enables to control voltage stably, which is difficult in the conventional technology, even in a short SW ON time such as less than 50 ns at typical condition. Narrow SW ON Pulse enables direct convert of high output voltage to low output voltage. The output voltage VOUT 3.3 V can be output directly from the supply voltage VIN 24 V at 2.2 MHz. Figure 29. Switching Waveform (VIN = 24 V, VOUT = 3.3 V, IOUT = 0.5 A, fSW = 2.2 MHz) 2. Light Load Mode Control and Forced PWM Mode Control BD9P1x5EFV-C is a synchronous DC/DC converter with integrated POWER MOSFETs and realizes high transient response by using current mode Pulse Width Modulation (PWM) mode control architecture. Under a heavy load, the switching operation is performed with the PWM mode control at a fixed frequency. When the load is lighter, the operation is changed over to the Light Load Mode (LLM) control to improve the efficiency. Figure 30. Efficiency (Light Load Mode, PWM Mode) Output Current IOUT [A] VSW (5 V/div) fSW = 2.2 MHz Time (100 ns/div) VOUT = 3.3 V (5 V/div) VIN = 24 V Light Load Mode PWM Mode |
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