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参数资料
| 型号： | L497B |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDIP16 |
| 封装： | DIP-16 |
| 文件页数： | 6/11页 |
| 文件大小： | 474K |
| 代理商： | L497B |
Obsolete
Product(s)
- Obsolete
Product(s)
PIN FUNCTIONS (continued)
N
°
Name
Function
14
DRIVER EMITTER
OUTPUT
Current Driver for the External Darlington. To ensure stability and precision
of Tdesat Cc and R9 must be used. Recommended value for R9 is 2 K
in
order not to change the open loop gain of the system.
Rc may be added to Cc to obtain greater flexibility in various application
situations.
Cc and Rc values ranges are 1 to 100 nF and 5 to 30 K
depending on the
external darlington type.
15
OVERVOLTAGE LIMIT
The darlington is protected against overvoltage by means of an internal
zener available at this pin and connected to pin 14. The internal divider
R3/R2 defines the limitation value given by :
Vovp
=
22.5
R3
+ 5.103
R2
+ 22.5
16
DRIVER COLLECTOR
INPUT
The collector current of the internal driver which drives the external
darlington is supplied through this pin. Then the external resistor R6 limits
the maximum current supplied to the base of the external darlington.
ELECTRICAL CHARACTERISTICS (VS = 14.4 V, – 40
°C < Tj < 125 °C unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V3
Min Op. Voltage
3.5
V
I3
Supply Current
V3 = 6 V
V3 = 4 V
5
7
18
25
13
mA
VS
Voltage Supply
28
V
VZ3
Supply Clamping Zener Voltage
IZ3 = 70 mA
6.8
7.5
8.2
V
V5
Input Voltage
Low Status
High Status
2.5
0.6
V
I5
Input Current
V5 = LOW
– 400
– 50
A
V16–14
Darlington Driver Sat. Current
I14 = 50 mA
I14 = 180 mA
0.5
0.9
V
VSENS
Current Limit. Sensing Voltage
VS = 6 to 16 V
260
320
370
mV
I11C
CW Charge Current
VS = 5.3 to 16V
V11 = 0.5V
T = 10 to 33ms
– 11.0
– 9.3
– 7.8
A
I11D
CW Charge Current
VS = 5.3 to 16V
V11 = 0.5V
T = 10 to 33ms
0.5
0.7
1.0
A
I11C / I11D
VS = 5.3 to 16V
V11 = 0.5V
T = 10 to 33ms
See Note 1
7.8
22.0
ISRC
ISENSE
Percentage of Output Current
Determining the Slow Recovery
Control Start (fig. 2), note 1
90
94
98.5
%
TSRC
Duration of Altered Small Contr.
Ratio after SRC Function Start
(fig. 2)
CSRC = 1
F
R7 = 62 K
0.8
s
VZ15
External Darlington over V Prot.
Zener Voltage
I15 = 5 mA
I15 = 2 mA
19
18
22.5
21.5
26
25
V
TP
Permanent Conduction Time
V5 = High
CP = 1
F
R7 = 62K
0.4
1.1
1.8
s
L497
4/11
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| L497D1 | 功能描述:马达/运动/点火控制器和驱动器 Hall Effect Control RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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| L4981A | 制造商:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR 4981 DIP20 |
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