PBL3776-1 Datasheet, PDF (4/8 Pages) Ericsson – Dual Controller IC for High Current Stepper Motor Applications

PBL 3776/1
PWR GND ₁ 1
T1BL 2
24 PWR GND ₂
23 T2BL
T1BU 3
22 T2BU
T1AL 4
21 T2AL
T1AU 5
20 T2AU
VBB1 6
SGND ₁ 7
VR₁ 8
C₁ 9
Phase ₁ 10
Dis ₁ 11
RC 12
PBL ^{19 VBB 2}
3776/1 ^{18 SGND 2}
17 VR₂
16 C₂
15 Phase ₂
14 Dis ₂
13 Vcc
Figure 4. Pin configuration.
Pin Description
DIP
Symbol
Description
1
PWR GND "Power Ground" from output channel 1. Connected to the ground path (see application examples).
1
2
T1BL
Output, channel 1, B side lower transistor. The pin will sink current when phase is high.
3
T1BU
Output, channel 1, B side upper transistor. The pin will source current when phase is low.
4
T1AL
Output, channel 1, A side lower transistor. The pin will sink current when phase is low.
5
T1AU
Output, channel 1, A side upper transistor. The pin will source current when phase is high.
6
VBB1
Supply voltage for driving channel 1 outputs.
7
SGND
Sense ground channel 1. Logic ground reference and sense ground for the current control feedback-
1
loop.
8
VR₁
9
C₁
10
Phase₁
11
Dis
1
12
RC
13
Vcc
14
Dis₂
Reference voltage, channel 1. Controls the comparator threshold voltage and hence the output
current.
Comparator input channel 1. This input senses the instantaneous voltage across the sensing resistor,
filtered by the internal digital filter or an optional external RC network.
Controls the direction of channel 1 outputs T1AL, T1AU, T1BL and T1BU.
Disable input for channel 1. When HIGH, all four output transistors are turned off, which results in a
rapidly decreasing output current to zero.
Clock oscillator RC pin. Connect a 12 kohm resistor to V_CC and a 4 700 pF capacitor to ground to
obtain the nominal switching frequency of 23.0 kHz and a digital filter blanking time of 1.0 µs.
Logic voltage supply, nominally +5 V.
Disable input for channel 2. When HIGH, all four output transistors are turned off, which results in a
rapidly decreasing output current to zero.
15
Phase
2
16
C₂
17
VR₂
18
SGND ₂
Controls the direction of channel 2 outputs T2AL, T2AU, T2BL and T2BU.
Comparator input channel 2. This input senses the instantaneous voltage across the sensing resistor,
filtered by the internal digital filter or an optional external RC network.
Reference voltage, channel 2. Controls the comparator threshold voltage and hence the output
current.
Sense ground channel 1. Logic ground reference and sense ground for the current control feedback-
loop.
19
VBB2
Supply voltage for driving channel 2 outputs.
20
T2AU
Output, channel 2, A side upper transistor. The pin will source current when phase is high.
21
T2AL
Output, channel 2, A side lower transistor. The pin will sink current when phase is low.
22
T2BU
Output, channel 2, B side upper transistor. The pin will source current when phase is low.
23
T2BL
Output, channel 2, B side lower transistor. The pin will sink current when phase is high.
24
PWR GND "Power Ground" from output channel 2. Connected to the ground path (see application examples).
2
4