参数资料
型号: BD6231F-E2F8
元件分类: 运动控制电子
英文描述: BRUSH DC MOTOR CONTROLLER, 1 A, PDSO8
封装: ROHS COMPLIANT, SOP-8
文件页数: 4/17页
文件大小: 383K
代理商: BD6231F-E2F8
Technical Note
12/16
BD6230, BD6231, BD6232, BD6235, BD6236, BD6237
www.rohm.com
2009.08 - Rev.C
c
2009 ROHM Co., Ltd. All rights reserved.
c) Thermal shutdown (TSD) circuit
The TSD circuit operates when the junction temperature of the driver exceeds the preset temperature (175°C
nominal). At this time, the controller forces all driver outputs to high impedance. Since thermal hysteresis is provided
in the TSD circuit, the chip returns to normal operation when the junction temperature falls below the preset
temperature (150°C nominal). Thus, it is a self-returning type circuit.
The TSD circuit is designed only to shut the IC off to prevent thermal runaway. It is not designed to protect the IC or
guarantee its operation in the presence of extreme heat. Do not continue to use the IC after the TSD circuit is
activated, and do not operate the IC in an environment where activation of the circuit is assumed.
d) Over current protection (OCP) circuit
To protect this driver IC from ground faults, power supply line faults and load short circuits, the OCP circuit monitors
the output current for the circuit’s monitoring time (10s, nominal). When the protection circuit detects an over
current, the controller forces all driver outputs to high impedance during the off time (290s, nominal). The IC
returns to normal operation after the off time period has elapsed (self-returning type). At the two channels type, this
circuit works independently for each channel.
Fig.43 Over current protection (timing chart)
Interfaces
Fig.44 FIN / RIN
Fig.45 VREF
Fig.46 OUT1 / OUT2
Fig.47 OUT1 / OUT2
(SOP8/HRP7)
(HSOP25/HSOPM28)
Threshold
Iout
CTRL Input
Internal status
Monitor / Timer
0
OFF
ON
mon.
off timer
ON
FIN
VCC
RIN
100k
VREF
VCC
10k
OUT1
OUT2
VCC
GND
VCC
OUT1
OUT2
RNF
GND
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