- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄96115 > PBL3776/1NS (ERICSSON POWER MODULES AB) STEPPER MOTOR CONTROLLER, 0.5 A, PDIP24 PDF資料下載
參數(shù)資料
| 型號： | PBL3776/1NS |
| 廠商： | ERICSSON POWER MODULES AB |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 0.5 A, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 120K |
| 代理商： | PBL3776/1NS |
PBL 3776/1
5
Functional Description
Each channel of the PBL 3776/1
consists of the following sections:
An output section with four output
transistors, two sourcing and two
sinking, intended to drive the four
transistors in an external H-bridge.
Each transistor is capable of driving
up to 200 mA continuous current.
A logic section that controls the
output transistors.
An S-R flip-flop, and a comparator.
The clock-oscillator is common to
both channels.
Constant current control is achieved
by switching the output current to the
windings. This is done by sensing the
peak current through the winding via a
current-sensing resistor R
S, effectively
connected in series with the motor
winding. As the current increases, a
voltage develops across the sensing
resistor, which is fed back to the
comparator. At the predetermined level,
defined by the voltage at the reference
input V
R, the comparator resets the flip-
flop, which turns off the sourcing output
transistor in the circuit. Consequently the
correspond-ing lower external transistor,
in the H-bridge, is turned off. The turn-off
of one channel is independent of the
other channel. The current decreases
until the clock oscillator triggers the flip-
flops of both channels simultaneously,
which turns on the output transistors
again, and the cycle is repeated.
To prevent erroneous switching due to
switching transients at turn-on, the PBL
3776/1 includes a digital filter. The clock
oscillator provides a blanking pulse
which is used for digital filtering of the
voltage transient across the current
sensing resistor during turn-on. Due to
the high output drive capability, this
transient might exceed the max. allowed
voltage on the C inputs and damage the
circuit. A resistor is placed in the
feedback loop in order to prevent this
transient from damaging the circuit.
The current paths during turn-on, turn-
off and phase shift are shown in figure 6.
Applications Information
Output current
The maximum peak output, sink/source,
current is 500 mA. But due to the power
handling capacity of the package this
Figure 5. Typical 5 A stepper motor driver application with PBL 3776/1. One channel shown.
current can only be used for a short
period of time (1mS). Recommended
max continuous output current is 200
mA/output transistor. This is practical
when driving MOS FET power
transistors, since a high peak output
current capability will rapidly charge/
discharge the gate capacitance, while
the continuous current usage is very
small.
Current control
The regulated output current level to the
motor winding is determined by the
voltage at the reference input and the
value of the sensing resistor, R
S. The
peak current through the sensing
resistor (and the motor winding) can be
expressed as:
I
M,peak = 0.1VR / RS
[A]
With a recommended value of 0.1 ohm
for the sense resistor R
S, a
5 V referen-
ce voltage will produce an output current
of approximately 5 A. R
S should be
selected for maximum motor current.
Chopping frequency, winding inductance
and supply voltage also affect the
current, but to much less extent.
+5 V
+
RC
PBL
3776/1
VCC
V CC
S
R
Q
Logic
S
R Q
+
–
+
–
Logic
VR2
VBB1
Phase 2
Phase 1
Dis
2
C2
SGND 2
Pwr GND2
T1BL
T1AU
T1AL
BB2
V
T2BU
T2AU
T2AL
T2BL
VR1
Dis1
C1
SGND 1
Pwr GND 1
24
18
23
21
20
22
19
16
17
14
15
12
13
10
11
89
7
1
2
4
5
3
6
390
270
270
390
0.11
R1
R2
R3
R4
Q1
270
390
R5
R6
R7
R8
Q3
Q4
IRFZ34
Rs
Rt
Ct
12 k
4700 pF
Vmm
+
390
270
Q2
IRF9Z34
PHASE CH 2
DISABLE CH 2
REFERENCE VOLTAGE CH 2
R8
1k
T1BU
1000pF
相關PDF資料 |
PDF描述 |
|---|---|
| PBL37770SO | STEPPER MOTOR CONTROLLER, 1.8 A, PDSO20 |
| PBL37770QN | STEPPER MOTOR CONTROLLER, 1.8 A, PQCC28 |
| PBL37770N | STEPPER MOTOR CONTROLLER, 1.8 A, PDIP16 |
| PBL3777SO:T | STEPPER MOTOR CONTROLLER, 0.9 A, PDSO24 |
| PBL3829QN | SWITCHING REGULATOR, PQCC44 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PBL3780/02N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Circuit (Support) |
| PBL3780N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Circuit (Support) |
| PBL3781 | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:LOW VOLTAGE SPEECH CIRCUIT |
| PBL3781/02 | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:LOW VOLTAGE SPEECH CIRCUIT |
| PBL3781/02N | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:LOW VOLTAGE SPEECH CIRCUIT |
發(fā)布緊急采購，3分鐘左右您將得到回復。