PSSI2021SAY Datasheet | Philips Semiconductors

FEATURES - One chip constant current source - Reduced number of ponents and board space. APPLICATIONS - Especially suitable for space reduction in, for example, LED driving circuits or active bias controlling. 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 m A by connection of external resistors between pins 4 and 5. MARKING TYPE NUMBER PSSI2021SAY MARKING CODE S1p 5 handbook, halfpage 4 5 PINNING PIN 1 2 3 4 5 SYMBOL n.c. Istab/Vout GND Rexternal VS DESCRIPTION not connected stabilized current/output voltage ground external resistor supply voltage Top view 1 n.c. MGU348 Fig.1 Simplified outline (SC-88A) and symbol. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 60134). SYMBOL VS Vout VR Istab Ptot Tstg Tj Tamb Note 1. Device mounted on a FR4 printed-circuit board. PARAMETER supply voltage output voltage reverse voltage continuous stabilized current (DC) total power dissipation storage temperature junction temperature operating ambient temperature Tamb ≤ 25 °C; note 1 VS = 75 V between all terminals CONDITIONS - - - - - - 65 - - 65 MIN. MAX. 75 73 0.5 50 335 +150 150 +150 V V V m A m W °C °C °C UNIT 2001 May 07 Philips Semiconductors Product specification Constant current source THERMAL CHARACTERISTICS SYMBOL Rth j-a Note 1. Device mounted on a FR4 printed-circuit board. CHARACTERISTICS Tamb = 25 °C unless otherwise specified. SYMBOL Istab Isupply PARAMETER stabilized current supply current CONDITIONS VS = 12 V; Vout = 0 to 10 V; Rexternal = infinity VS = 12 V; Vout = 0 to 10 V; Istab = 15 µA VS = 75 V; Vout = 0 V; Istab = 15 µA ∆ I stab -------------I stab ∆ I stab -----------------------∆ T × I stab stability of stabilized current as a function of Vcontrol stability of stabilized current as a function of...