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PSSI2021SAY Datasheet Preview

PSSI2021SAY Datasheet

Constant current source

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DISCRETE SEMICONDUCTORS
DATA SHEET
k, halfpage
MBD127
PSSI2021SAY
Constant current source
Product specification
2001 May 07




Philips

PSSI2021SAY Datasheet Preview

PSSI2021SAY Datasheet

Constant current source

No Preview Available !

Philips Semiconductors
Constant current source
Product specification
PSSI2021SAY
FEATURES
One chip constant current source
Reduced number of components and board space.
APPLICATIONS
Especially suitable for space reduction in, for example,
LED driving circuits or active bias controlling.
PINNING
PIN SYMBOL
DESCRIPTION
1 n.c.
not connected
2 Istab/Vout stabilized current/output voltage
3 GND
ground
4 Rexternal
5 VS
external resistor
supply voltage
DESCRIPTION
Resistor equipped PNP transistor with two diodes on one
chip in a plastic SC-88A package. Built-in bias resistor and
two diodes allow operation as constant current source.
The stabilized current can be adjusted between 15 µA and
50 mA by connection of external resistors between
pins 4 and 5.
MARKING
TYPE NUMBER
PSSI2021SAY
MARKING CODE
S1p
handbook, halfp5age
4
5
4
12
Top view
3
12
3
n.c.
MGU348
Fig.1 Simplified outline (SC-88A) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL
PARAMETER
VS
Vout
VR
Istab
Ptot
Tstg
Tj
Tamb
supply voltage
output voltage
reverse voltage
continuous stabilized current (DC)
total power dissipation
storage temperature
junction temperature
operating ambient temperature
CONDITIONS
VS = 75 V
between all terminals
Tamb 25 °C; note 1
Note
1. Device mounted on a FR4 printed-circuit board.
MIN.
65
65
MAX.
75
73
0.5
50
335
+150
150
+150
UNIT
V
V
V
mA
mW
°C
°C
°C
2001 May 07
2


Part Number PSSI2021SAY
Description Constant current source
Maker Philips
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