Datasheet

ManualsBrandsINFINEON TECHNOLOGIES ManualsPMICsPMIC - power management - special purpose PG SOT343 4

2007-05-29

BCR400W

Active Bias Controller

Characteristics

• Supplies stable bias current even at low battery

voltage and extreme ambient temperature variatio

• Low voltage drop of 0.7V

Application notes

• Stabilizing bias current of NPN transistors

and FET's from less than 0.2mA up to

more than 200mA

• Ideal supplement for Sieget and other transistors

• also usable as current source up to 5mA

• Pb-free (RoHS compliant) package

• Qualified according AEC Q101

EHA07188

4 3

Type Marking Pin Configuration Package

BCR400W W4s

1=GND/E

NPN

2=Contr/B

NPN

4=Rext/C

NPN

SOT343

NPN

, B

NPN

, C

NPN

are electrodes of a stabilized NPN transistor)

Maximum Ratings

Parameter Symbol Value Unit

Source voltage V

18 V

Control current I

Contr.

10 mA

Control voltage V

Contr.

16 V

Reverse voltage between all terminals V

0.5

Total power dissipation, T

= 117 °C

tot

330 mW

Junction temperature T

150 °C

Storage temperature T

stg

-65 ... 150

Thermal Resistance

Junction - soldering point

thJS

≤ 100 K/W

Pb-containing package may be available upon special request

For calculation of

thJA

please refer to Application Note Thermal Resistance

Summary of content (9 pages)

PAGE 1
BCR400W Active Bias Controller Characteristics • Supplies stable bias current even at low battery 3 voltage and extreme ambient temperature variation 2 4 1 • Low voltage drop of 0.7V Application notes 4 • Stabilizing bias current of NPN transistors 3 and FET's from less than 0.
PAGE 2
BCR400W Electrical Characteristics at TA=25°C, unless otherwise specified Parameter Symbol Values Unit min. typ. max. I0 - 20 40 µA Imin - 0.1 - mA VSmin - 1.6 - V Vdrop - 0.65 - Change of IC versus hFE hFE = 50 ∆IC/I C - 0.08 - Change of IC versus V S VS = 3 V ∆IC/I C - 0.15 - ∆VS/VS Change of IC versus TA ∆IC/I C - 0.
PAGE 3
BCR400W Collector current I C = f (hFE) Collector Current I C = f (VS) IC and h FE refer to stabilized NPN Transistor of stabilized NPN Transistor Parameter Rext. (Ω) Parameter Rext. (Ω) 10 3 10 3 mA 2.1 mA 5.9 5.9 10 2 12.4 IC IC 10 2 10 1 10 0 67 67 10 1 10 0 760 760 4.3k 10 -1 0 50 100 150 200 - 250 10 -1 0 350 2 4 6 V 8 hFE 11 VS Voltage drop Vdrop = f (IC ) Collector current I C = f (Rext.) of stabilized NPN Transistor V 10 3 2 mA 1.7 10 2 1.
PAGE 4
BCR400W Collector current TA = f (IC) Control current I = f (Rext.) of stabilized NPN Transistor in current source application Parameter: Rext. (Ω) 10 1 10 3 mA 2.2 mA IContr. 6 10 2 IC 26 65 10 1 10 0 290 760 10 0 4.3k 10 -1 -40 -20 0 20 40 60 80 100 120 °C 10 -1 -1 10 160 10 0 10 1 10 2 3 KOhm 10 Rext. TA Control current I = f (TA) Control current I = f (V S) in current source application in current source application 2.2 1.5 mA mA 1.8 1.1 IContr. IContr. 1.
PAGE 5
BCR400W Total power dissipation Ptot = f (TS ) 400 Note that up to TS=115°C it is not possible to exceed Ptot respecting the maximum ratings of VS and IContr. mW P tot 300 The collector or drain current (respectively) of the stabilized RF transistor does not affect BCR 400 directly, as it provides just the base current.
PAGE 6
BCR400W RF transistor controlled by BCR400 +V S BCR 400 3 R ext. Vdrop 4 Be aware that BCR400 stabilized bias current of transistors in an active control loop ΙC 1 2 C1 In order to avoid loop ascillation (hunting), time constants must be chosen adequately, i.e. C1 >= 10 x C2 C2 RF OUT Ι contr.
PAGE 7
BCR400W Low voltage reference BCR 400 Red LED 1 4 2 3 +VS V REF EHA07219 Precision timer with BCR400 providing constant charge current +VS BCR 400 3 2 R ext 7 8 4 Timer IC (555) 4 1 3 6 2 1 5 EHA07191 7 2007-05-29
PAGE 8
Package SOT343 BCR400W Package Outline 0.9 ±0.1 2 ±0.2 0.1 MAX. 1.3 0.1 A 1 2 0.1 MIN. 0.15 1.25 ±0.1 3 2.1 ±0.1 4 0.3 +0.1 -0.05 +0.1 0.15 -0.05 +0.1 0.6 -0.05 4x 0.1 0.2 M M A Foot Print 1.6 0.8 0.6 1.15 0.9 Marking Layout (Example) Manufacturer 2005, June Date code (YM) BGA420 Type code Pin 1 Standard Packing Reel ø180 mm = 3.000 Pieces/Reel Reel ø330 mm = 10.000 Pieces/Reel 0.2 2.3 8 4 Pin 1 2.15 1.
PAGE 9
BCR400W Published by Infineon Technologies AG 81726 München, Germany © Infineon Technologies AG 2007. All Rights Reserved. Attention please! The information given in this data sheet shall in no event be regarded as a guarantee of conditions or characteristics (“Beschaffenheitsgarantie”).