PBL3771 데이터 시트보기 (PDF) - Ericsson
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PBL3771 Datasheet PDF : 8 Pages
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PBL 3771/1
NC 1
24 NC
MB1 2
E1 3
23 MB2
22 E2
VMM1 4
21 VMM2
MA1 5
GND 6
GND 7
PBL
20 MA2
3771/1 SO 19 GND
18 GND
Phase1 8
CD1 9
17 Phase2
16 CD2
VR1 10
15 VR2
C1 11
14 C2
Vcc 12
13 RC
MB1 1
22 MB2
E1 2
VMM1 3
21 E2
20 VMM2
MA1 4
19 MA2
GND 5
GND 6
Phase1 7
18 GND
PBL
3771/1N 17 GND
16 Phase 2
CD1 8
15 CD2
VR1 9
14 VR2
C1 10
VCC 11
13 C2
12 RC
VMM2 5
E2 6
M B2 7
M B1 8
GND 9
E1 10
VMM1 11
PBL 3771/1QN
25 VR2
24 C2
23 RC
22 VCC
21 C1
20 VR1
19 CD1
Figure 4. Pin configuration.
Pin Description
Refer to figure 4.
SO
DIP
PLCC
2
1
8
3
2
10
4
3
11
5
4
12
6,7, 5,6,
18,19 17,18
1-3,9,
13-17,28
8
7
18
9
8
19
10
9
20
11
10
21
12
11
22
13
12
23
14
13
24
15
14
25
16
15
26
17
16
27
20
19
4
21
20
5
22
21
6
23
22
7
Symbol
MB1
E1
VMM1
MA1
GND
Phase1
CD
1
VR1
C1
VCC
RC
C
2
VR2
CD2
Phase2
M
A2
VMM2
E
2
MB2
Description
Motor output B, channel 1. Motor current flows from MA1 to MB1 when Phase1 is HIGH.
Common emitter, channel 1. This pin connects to a sensing resistor to ground.
Motor supply voltage, channel 1, 10 to 40 V. VMM1 and VMM2 should be connected together.
Motor output A, channel 1. Motor current flows from MA1 to MB1 when Phase1 is HIGH.
Ground and negative supply. Note: these pins are used thermally for heat-sinking.
Make sure that all ground pins are soldered onto a suitably large copper ground
plane for efficient heat sinking.
Controls the direction of motor current at outputs MA1 and MB1. Motor current flows from MA1
to M when Phase is HIGH.
B1
1
Current decay control, channel 1. A logic HIGH on this input results in slow current decay,
a LOW results in fast current decay, see “Functional Description.”
Reference voltage, channel 1. Controls the threshold voltage for the comparator and hence
the output current. Input resistance is typically 2.5 kohms, ±20%.
Comparator input channel 1. This input senses the instantaneous voltage across the
sensing resistor, filtered by an RC network. The threshold voltage for the comparator is
(0.450 / 2.5) • VR1, i.e. 450 mV at VR1 = 2.5 V.
Logic voltage supply, nominally +5 V.
Clock oscillator RC pin. Connect a 15 kohm resistor to VCC and a 3300 pF capacitor to
ground to obtain the nominal switching frequency of 26.5 kHz.
Comparator input channel 2. This input senses the instantaneous voltage across the
sensing resistor, filtered by an RC network. The threshold voltage for the comparator is
(0.450 / 2.5) • VR1, i.e. 450 mV at VR1 = 2.5 V.
Reference voltage, channel 2. Controls the threshold voltage for the comparator and hence
the output current. Input resistance is typically 2.5 kohms, ±20%.
Current decay control, channel 2. A logic HIGH on this input results in slow current decay,
a LOW results in fast current decay, see “Functional Description.”
Controls the direction of motor current at outputs MA2 and MB2. Motor current flows from MA2
to M when Phase is HIGH.
B2
2
Motor output A, channel 2. Motor current flows from M to M when Phase is HIGH.
A2
B2
2
Motor supply voltage, channel 2, 10 to 40 V. VMM1 and VMM2 should be connected together.
Common emitter, channel 2. This pin connects to a sensing resistor to ground.
Motor output B, channel 2. Motor current flows from MA2 to MB2 when Phase2 is HIGH.
4
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