HA17385HRP 查看數據表（PDF） - Hitachi -> Renesas Electronics

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产品描述 (功能)

生产厂家

HA17385HRP

High Speed Current Mode PWM Control IC for Switching Power Supply

Hitachi -> Renesas Electronics 

HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP

100

Ta = 25°C

75

VIN = 15V

50

25

0

500 1k

2k

5k 10k 20k

50k 100k 200k

Timing Resistance RT (Ω)

Note: In the oscillation system of this IC, a constant discharging current of 8.4mA

flows the timing capacitor during triangular wave fall. Therefore, note that a

small maximum ON duty (large dead band) leads to a large supply current.

Refer to the equations of oscillation frequency and supply current for details.

Figure 9 PWM Pulse ON Duty vs. Timing Resistance

20

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