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BPW38
HERMETIC SILICON PHOTODARLINGTON
PACKAGE DIMENSIONS
0.209 (5.31)
0.184 (4.67)
0.030 (0.76)
NOM
0.255 (6.48)
0.50 (12.7)
MIN
Base
Emitter
0.040 (1.02)
0.040 (1.02)
45°
0.020 (0.51) 3X
0.100 (2.54)
0.050 (1.27)
Collector
(Case)
Ø0.100 (2.54)
NOTES:
1. Dimensions for all drawings are in inches (mm).
2. Tolerance of ± .010 (.25) on all non-nominal dimensions
unless otherwise specified.
FEATURES
• Hermetically sealed package
• Narrow reception angle
• European “Pro Electron” registered
DESCRIPTION
• The BPW38 is a silicon photodarlington
mounted in narrow angle TO-18 package.
SCHEMATIC
C
B
E
1. Derate power dissipation linearly 3.00 mW/°C above 25°C ambient.
2. Derate power dissipation linearly 6.00 mW/°C above 25°C case.
3. RMA flux is recommended.
4. Methanol or isopropyl alcohols are recommended as cleaning
agents.
5. Soldering iron tip 1/16” (1.6mm) minimum from housing.
6. As long as leads are not under any stress or spring tension.
7. Light source is a GaAs LED emitting light at a peak wavelength of
940 nm.
ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified)
Parameter
Operating Temperature
Storage Temperature
Soldering Temperature (Iron)(3,4,5 and 6)
Soldering Temperature (Flow)(3,4 and 6)
Collector-Emitter Voltage
Collector-Base Voltage
Emitter-Base Voltage
Power Dissipation (TA = 25°C)(1)
Power Dissipation (TC = 25°C)(2)
Symbol
TOPR
TSTG
TSOL-I
TSOL-F
VCEO
VCBO
VEBO
PD
PD
Rating
-65 to +125
-65 to +150
240 for 5 sec
260 for 10 sec
25
25
12
300
600
Unit
°C
°C
°C
°C
V
V
V
mW
mW
2001 Fairchild Semiconductor Corporation
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BPW38
HERMETIC SILICON PHOTODARLINGTON
ELECTRICAL / OPTICAL CHARACTERISTICS (TA =25°C) (All measurements made under pulse conditions)
PARAMETER
TEST CONDITIONS
SYMBOL
MIN
TYP
MAX
UNITS
Collector-Emitter Breakdown
Emitter-Base Breakdown
Collector-Base Breakdown
Collector-Emitter Leakage
Reception Angle at 1/2 Sensitivity
IC = 10 mA, Ee = 0
IE = 100 µA, Ee = 0
IC = 100 µA, Ee = 0
VCE = 12 V, Ee = 0
BVCEO
BVEBO
BVCBO
ICEO
0
25
12
25
——V
——V
——V
— 100 nA
±8 — Deg.
On-State Collector Current
Rise Time
Fall Time
Ee = 0.125 mW/cm2
VCE = 5 V(7)
IC(ON)
7.5
— mA
IC = 10 mA, VCC = 10 V
RL = 100 1
tr
— 300 — µs
IC = 10 mA, VCC = 10 V
RL = 100 1
tf
— 250 — µs
TYPICAL PERFORMANCE CURVES
100
Ee = 5.0 mW/cm2
Ee = 2.0 mW/cm2
Ee = 1.0 mW/cm2
10
Ee = 0.5 mW/cm2
Ee = 0.2 mW/cm2
1.0
Ee = 0.1 mW/cm2
Ee = 0.05 mW/cm2
Normalized to:
VCE = 5 V
0.1 Ee = .2 mW/cm2
0 5 10 15 20 25 30 35
VCE - COLLECTOR TO EMITTER (V)
Fig. 1 Light Current vs. Collector to Emitter Voltage
10
1.0
0.1
Normalized to:
VCE = 5 V
Ee = 0.2 mW/cm2
0.01
-50
-25
0
25 50 75 100 125
TA - TEMPERATURE (˚C)
Fig. 2 Relative Light Current vs. Ambient Temperature
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BPW38
HERMETIC SILICON PHOTODARLINGTON
TYPICAL PERFORMANCE CURVES
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
400
500 600 700 800 900 1000 1100 1200
D- WAVELENGTH - NANOMETERS
Fig. 3 Spectral Response Curve
110
100
90
80
70
60
50
40
30
20
10
0
-90˚ -70˚ -50˚ -30˚ -10˚ 10˚ 30˚ 50˚ 70˚ 90˚
DEGREES
Fig. 4 Angular Response
100
Load Resistance
101
Normalized to:
1001
RL = 1001
10 IL = 10 mA
1.0 10001
0.1
0.01
VCC = 10 V
0.1 1.0
10 100
RELATIVE SWITCHING SPEED
Fig. 5 Light Current vs. Relative Switching Speed
INPUT
LED
BPW38
VCC 1.0 V
I RL
OUTPUT
td
tr
90 %
OUTPUT
PULSE
10 %
tf
ts
INPUT PULSE
tON = td + tr
tOFF = ts + tf
Fig. 6 Test Circuit and Voltage Waveforms
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BPW38
HERMETIC SILICON PHOTODARLINGTON
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED
HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF
OTHERS.
LIFE SUPPORT POLICY
FAIRCHILDS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical
implant into the body,or (b) support or sustain life,
and (c) whose failure to perform when properly
used in accordance with instructions for use provided
in labeling, can be reasonably expected to result in a
significant injury of the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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