参数资料
型号: BD9011EKN-E2
厂商: Rohm Semiconductor
文件页数: 23/30页
文件大小: 0K
描述: IC REG CTRLR BST PWM 36-HQFN
标准包装: 1
PWM 型: 控制器
输出数: 2
频率 - 最大: 550kHz
电源电压: 3.9 V ~ 30 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 105°C
封装/外壳: 36-TQFN 裸露焊盘
包装: 标准包装
产品目录页面: 1372 (CN2011-ZH PDF)
其它名称: BD9011EKN-E2DKR
2) Oscillator Synchronization by External Pulse Signal
At the operation the oscillator is externally synchronized, input the synchronization signal into Fin in addition to connect a
resistor and a capacitor at RT and CT, respectively.
Input the external clock pulse on Fin, which is higher frequency than the fixed one. However, the frequency variation
should be less than 20%.
Also, the duty cycle of the pulse should be set from 10% to 90%.
Fin
: Fixed with RT and CT
CT
: Synchronized
CT Waveform during Synchronized with External Pulse
Short Fin to GND if the function of external synchronization is not needed.
Fin
Without Synchronization Signal
3)Setting the Over Current Threshold Level
The OCP detection level ( Iocp ) is determined by the ON resistance (R ON ) of the main MOSFET switch and the resistance
(Rcl) which is placed between CL and VCC.
Iocp =
Rcl
× 10 -5
[A]
( typ. )
R ON
To prevent a malfunction caused by noise, place a capacitor ( Ccl ) parallel to Rcl.
If OCP function is not needed, short VS to VCC, and short CL to GND.
VCC
Rcl
CL
VS
With OCP
Ccl
To Main MOSFET Drain
CL, VS Pin Connection
23/29
Without OCP
CL
VS
VCC
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