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BD61243FV Datasheet(PDF) 10 Page - Rohm

Part # BD61243FV
Description  Multifunction Single-phase Full-wave
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD61243FV Datasheet(HTML) 10 Page - Rohm

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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
www.rohm.com
BD61243FV
TSZ02201-0H1H0B101290-1-2
Jun.19.2015 Rev. 001
Application Circuit Examples (Constant Values are for Reference)
1. PWM Input Application
It is an example of the application of the external PWM input, and controlling the rotational speed. In this application,
minimum rotational speed can be set.
Application Design Note
(1) The bypass capacitor connected must be more than the recommended constant value because there is a
possibility of the motor start-up failure etc. due to IC malfunction.
Substrate Design Note
(1) IC power(Vcc), motor power(Vm), motor outputs(OUT1, 2), and motor ground(MGND) lines are made as wide as
possible.
(2) IC ground (GND) line is common with the application ground except motor ground (i.e. hall ground etc.), and
arranged near to (–) land.
(3) The bypass capacitor and/or Zenner diode are placed near to VCC pin.
(4) H+ and H– lines are arranged side by side and made from the hall element to IC as short as possible, because it
is easy for the noise to influence the hall lines.
Figure 20. PWM Input Application
Reverse Polarity
Protection
Measure against back EMF
PWM
M
H
HALL
BIAS
SIG
to 1kΩ
0.22Ω to
1μF to
1kΩ
to 100kΩ
1kΩ
to 100kΩ
PWM
SLOPE
RNF
H+
H-
OUT1
REF
MIN
SSW
TSD
CONTROL
LOGIC
OSC
FILTER
VCC
REFE-
RENCE
PRE-
DRIVER
ZPER
OUT2
INSIDE
REG
13
12
11
10
2
3
4
5
6
7
9
8
FG
SIGNAL
OUTPUT
1
GND
14
+
-
COMP
Maximum output voltage and current
are 18V and 1.2A respectively
Connect bypass capacitor near
VCC terminal as much as possible.
Soft switching setting
Minimum duty setting
Stabilization of REF voltage
Re-circulate setting
Hall bias is set according to
the amplitude of hall
element output and hall
input voltage range.
Protection of FG open-drain
To limit motor current, the
current is detected.
Note the power consumption of
sense resistance.
Noise measures of substrate
Low-pass filter for rotation
speed instruction input
I/O duty slope setting
Linearization correction
resistance


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