GS-R4840NV [STMICROELECTRONICS]
36 W NEGATIVE SWITCHING REGULATOR; 36瓦反向开关稳压器
| 型号： | GS-R4840NV |
| 厂家： | 
ST |
| 描述： | 36 W NEGATIVE SWITCHING REGULATOR |
| 文件： | 总3页 (文件大小：40K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
GS-R4840NV
36 W NEGATIVE SWITCHING REGULATOR
Type
V
V
I
out
in
out
GS-R4840NV
-40 to -60 V -22 to -60 V -600 mA
FEATURES
Digital input for voltage selection
Short-circuit protection
Overvoltage protection
Thermal protection
Softstart
Fault signal indication output
High efficiency (>80%)
DESCRIPTION
The GS-R4840NV is a negative input, negative
output switching voltage regulator that provides up
to 36W output power without input-output isolation.
The output voltage is programmable by input logic
signals that allow 64 steps (6 bit) of regulated
output, from -22 to -60V.
ELECTRICAL CHARACTERISTICS (Tamb = 25°C unless otherwise specified)
Symbol
Parameter
Input Voltage
Test Conditions
= -22 to -60V
Min
Typ
Max
Unit
V
o
V
o
-40
-48
-60
V
i
I
= -10 to -600mA
Input Ripple Voltage
Output Voltage
V = -40 to -60V
I
I
= -600mA
V
i
o
o
20
-60
10
mVpp
V
ir
V = -40 to -60V
i
= -10 to -600mA
V
-22
o
Output Ripple
Voltage
V
o
= -22 to -60V
= -600mA
V
o
4
mVpp
or
I
Output Overvoltage
Protection
V = -40 to -60V
i
V
Vo+5%
-10
Vo+10%
-600
V
oov
I
o
= -10 to -600mA
Output Current
V = -40 to -60V
i
I
mA
mA
mA
o
V
o
= -22 to -60V
Current Limit
V = -40 to -60V
I
ol
-900
i
Overload Condition
Output Average
Short Circ. Current
V = -40 to -60V
i
I
-80
osc
Switching Frequency
Efficiency
f
100
82
kHz
%
s
V = -48V
o
I
= -600mA
o
η
80
i
V
= -48V
Thermal Resistance
Case to Ambient
R
4
°C/W
°C
th
Operating Case
Temperature Range
T
0
+85
cop
Storage
Temperature Range
T
-20
+105
°C
stg
December 1993
1/3
GS-R4840NV
CONNECTION DIAGRAM AND MECHANICAL DATA
Package F. Dimensions in mm. (inches)
PIN DESCRIPTION
Pin
Function
-Vin
Description
Negative input voltage.
1
Remote Inhibit/Enable logically compatible with CMOS or open collector TTL. The
converter is OFF (Inhibit) when this pin is unconnected or the voltage applied is in the
range of 2 to 5V (referred to GND). The converter is ON (Enable) for a control voltage in
the range of 0 to 0.8V maximum.
Inhibit/
Enable
2
Return for input voltage source and +5V logic supply voltage. Internally connected to pin
15.
GND IN
3
+5V IN
DB0
DB1
DB2
DB3
DB4
DB5
CS
+5V logic supply voltage. Maximum voltage must not exceed 7V.
4
5
Data bit 0 (LSB).
Data bit 1.
6
Data bit 2.
7
Data bit 3.
8
Data bit 4.
9
Data bit 5 (MSB).
10
11
Chip select. An active low input control which is the device enable input terminal.
Write control. An active low control which enables the microprocessor to write data to the
DAC.
WR
12
-Vout
Negative output voltage.
13
14
FAULT
FAULT indication output (referred to GND). The FAULT signal is high (TTL compatible
level) when:
- the INHIBIT is ON (high)
- an output overload is present (Vo < 18V typ.)
- an overtemperature is present
- an overvoltage is present (Vo > Vo+5%)
GND OUT
Return for output voltage source. Internally connected to pin 3.
15
Note: Case internally connected to Ground.
2/3
GS-R4840NV
USER NOTES
Digital Information
t
and t
have to be 100ns and 50ns minimum
DH
DS
The GS-R4840NV accepts 6 bit binary at the data
inputs DB0 to DB5. Data are transferred when CS
is low and during the rising edge of WR signal.
respectively (see fig. 1).
Figure 1 - Signals Timing.
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patentor patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
1994 SGS-THOMSON Microelectronics – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
3/3
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