SGS Thomson Microelectronics GS-R4840NV Datasheet
GS-R4840NV
36 W NEGATIVESWITCHING REGULATOR
Type V
GS-R4840NV -40 to -60 V -22 to -60 V -600 mA
in
V
out
I
out
FEATURES
Digital inputfor voltage selection
Short-circuit protection
Overvoltageprotection
Thermalprotection
Softstart
Fault signal indication output
High efficiency(>80%)
DESCRIPTION
The GS-R4840NV is a negative input, negative
output switchingvoltageregulator that providesup
to 36Woutputpowerwithoutinput-outputisolation.
ELECTRICAL CHARACTERISTICS (T
Symbol Parameter Test Conditions Min Typ Max Unit
Input Voltage Vo= -22 to -60V
V
i
Input Ripple Voltage Vi= -40 to -60V Io= -600mA
ir
Output Voltage Vi= -40 to -60V Io= -10 to -600mA
o
Output Ripple
or
Voltage
Output Overvoltage
oov
Protection
Output Current Vi= -40 to -60V
I
o
Current Limit Vi= -40 to -60V
I
ol
Output Average
Short Circ. Current
Switching Frequency
f
s
Efficiency Vi= -48V Io= -600mA
η
Thermal Resistance Case to Ambient
th
Operating Case
cop
Temperature Range
Storage
stg
Temperature Range
V
T
I
T
V
V
V
osc
R
=25°C unlessotherwise specified)
amb
Io= -10 to -600mA
Vo= -22 to -60V
Io= -600mA
Vi= -40 to -60V
Io= -10 to -600mA
Vo= -22 to -60V
Overload Condition
Vi= -40 to -60V
Vo= -48V
The output voltageis programmableby input logic
signals that allow 64 steps (6 bit) of regulated
output, from -22 to -60V.
-40 -48 -60 V
20 mVpp
-22 -60 V
4 10 mVpp
Vo+5% Vo+10% V
-10 -600 mA
-900 mA
-80 mA
100 kHz
80 82 %
4 °C/W
0 +85 °C
-20 +105 °C
December 1993 1/3
GS-R4840NV
CONNECTION DIAGRAM AND MECHANICAL DATA
PackageF. Dimensionsin mm. (inches)
PIN DESCRIPTION
Pin Function Description
-Vin Negative input voltage.
1
Inhibit/
2
Enable
GND IN
3
+5V IN +5V logic supply voltage. Maximum voltage must not exceed 7V.
4
DB0 Data bit 0 (LSB).
5
DB1 Data bit 1.
6
DB2 Data bit 2.
7
DB3 Data bit 3.
8
DB4 Data bit 4.
9
DB5 Data bit 5 (MSB).
10
CS Chip select. An active low input control which is the device enableinput terminal.
11
WR
12
-Vout Negative output voltage.
13
FAULT FAULTindication output (referred to GND). The FAULTsignal is high (TTL compatible
14
GND OUT Return for output voltage source. Internally connected to pin 3.
15
Note: Case internally connected to Ground.
Remote Inhibit/Enable logically compatible with CMOS or open collector TTL. The
converter is OFF (Inhibit) when this pinis unconnected or the voltage appliedis 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.
Return for input voltagesource and +5V logic supply voltage. Internallyconnected to pin
15.
Write control. An active low controlwhich enables the microprocessor to write data to the
DAC.
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%)
2/3
Loading...