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BD237 (NPN), BD234 (PNP), BD238 (PNP)
Preferred Devices
Plastic Medium Power Bipolar Transistors
Designed for use in 5.0 to 10 W audio amplifiers and drivers utilizing complementary or quasi complementary circuits.
Features http://onsemi.com
* DC Current Gain - * * *
hFE = 40 (Min) @ IC = 0.15 Adc Epoxy Meets UL 94 V0 @ 0.125 in ESD Ratings: Human Body Model, 3B; >8000 V Machine Model, C; >400 V Pb-Free Packages are Available*
2.0 AMPERES POWER TRANSISTORS 25 WATTS
TO-225 CASE 77 STYLE 1 32 1
II II I IIIIIIIIIIIIIIIIIIII I II IIIIIIIIIIIIIIIIIIII I II IIIIIIIIIIIIIIIIIIII I III IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIII I I I IIIIIIIIII I I II IIIIIIIIIII I IIIIIIIIIIIIIIIIIII III I II I II IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIII II IIIIIIIII I IIIIIIIIIIIIIIIIIIII I I II IIIIIIIIIIIIIIIIIIII IIIIIIIIIIII III I II I IIIIIIIIIIIIIIIIIIII I I II II IIIIIIIIIIIIIIIIIIII I I II II IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIII I I II IIIIIIIIIIIIIIIIIIII I I II IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII I I II II IIIIIIIIIIIIIIIIIIII I I II IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIII
MAXIMUM RATINGS
Rating Symbol VCEO VCBO VEBO IC IB BD234 45 60 BD237 BD238 80 Unit Vdc Vdc Vdc Adc Adc W Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current Base Current 100 5.0 2.0 1.0 25 Total Device Dissipation @ TC = 25_C PD Operating and Storage Junction Temperature Range TJ, Tstg - 55 to + 150 _C
MARKING DIAGRAM
YWW BD23xG
BD23x x Y WW G
= Device Code = 4, 7 or 8 = Year = Work Week = Pb-Free Package
THERMAL CHARACTERISTICS
Characteristic
ORDERING INFORMATION
Device BD234 BD234G BD237 BD237G BD238 BD238G Package TO-225 TO-225 (Pb-Free) TO-225 TO-225 (Pb-Free) TO-225 TO-225 (Pb-Free) Shipping 500 Units / Box 500 Units / Box 500 Units / Box 500 Units / Box 500 Units / Box 500 Units / Box
Symbol RqJC
Max 5.0
Unit
Thermal Resistance, Junction-to-Case
_C/W
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.
Preferred devices are recommended choices for future use and best overall value.
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
(c) Semiconductor Components Industries, LLC, 2005
1
November, 2005 - Rev. 14
Publication Order Number: BD237/D
BD237 (NPN), BD234 (PNP), BD238 (PNP)
IC, COLLECTOR CURRENT (AMP)
VCE , COLLECTOR-EMITTER VOLTAGE (VOLTS)
III I II I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIII I II I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I II I II I II I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I II I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I II II II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I III I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I II I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIII II I II I II I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I II IIIIIIII II II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIII I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIII
ELECTRICAL CHARACTERISTICS (TC = 25_C unless otherwise noted)
Characteristic Collector-Emitter Sustaining Voltage (Note 1) (IC = 0.1 Adc, IB = 0) Collector Cutoff Current (VCB = 100 Vdc, IE = 0) (VCB = 60 Vdc, IE = 0) Emitter Cutoff Current (VBE = 5.0 Vdc, IC = 0) Symbol Type Min 80 45 - - - Max - - Unit Vdc V(BR)CEO ICBO BD237, BD238 BD234 BD237, BD238 BD234 - mAdc 0.1 0.1 1.0 IEBO mAdc - DC Current Gain (IC = 0.15 A, VCE = 2.0 V) (IC = 1.0 A, VCE = 2.0 V) hFE1 hFE2 - - - - - 40 25 - -
-
-
Collector-Emitter Saturation Voltage (Note 1) (IC = 1.0 Adc, IB = 0.1 Adc) Base-Emitter On Voltage (Note 1) (IC = 1.0 Adc, VCE = 2.0 Vdc)
VCE(sat) VBE(on) fT
0.6 1.3 -
Vdc Vdc
Current-Gain - Bandwidth Product (IC = 250 mAdc, VCE = 10 Vdc, f = 1.0 MHz)
3.0
MHz
1. Pulse Test: Pulse Width x 300 ms, Duty Cycle x 2.0%.
10
100 ms 1 ms 5 ms TJ = 150C dc
3
1
The Safe Operating Area Curves indicate IC-VCE limits below which the device will not enter secondary breakdown. Collector load lines for specific circuits must fall within the applicable Safe Area to avoid causing a catastrophic failure. To insure operation below the maximum TJ, power-temperature derating must be observed for both steady state and pulse power conditions.
0.3 BD236 BD237 30
0.1
1
3
10
100
VCE, COLLECTOR-EMITTER VOLTAGE (VOLTS)
Figure 1. Active Region Safe Operating Area
1.0 0.8
IC = 0.1 A
0.25 A
0.5 A
1.0 A
0.6 TJ = 25C 0.4
0.2
0
0.2
0.3
0.5
1.0
2.0
3.0
5.0
10
20
30
50
100
200
IB, BASE CURRENT (mA)
Figure 2. Collector Saturation Region
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2
BD237 (NPN), BD234 (PNP), BD238 (PNP)
hFE , DC CURRENT GAIN (NORMALIZED) 1000 700 500 300 200 100 70 50 30 20 10 2.0 3.0 5.0 TJ = + 150C TJ = + 25C TJ = - 55C 1.5 VCE = 2.0 V VOLTAGE (VOLTS) 1.2 0.9 VBE(sat) @ IC/IB = 10 0.6 VBE @ VCE = 2.0 V 0.3 0 2.0 3.0 5.0 VCE(sat) @ IC/IB = 10 10 20 30 50 100 200 300 500 1000 2000 IC, COLLECTOR CURRENT (mA) TJ = 25C
10
20 30
50
100
200 300 500 1000 2000
IC, COLLECTOR CURRENT (mA)
Figure 3. Current Gain
Figure 4. "On" Voltages
r(t), NORMALIZED EFFECTIVE TRANSIENT THERMAL RESISTANCE
1.0 0.7 0.5 0.3 0.2
D = 0.5 D = 0.2 D = 0.1 D = 0.05 D = 0.01 SINGLE PULSE qJC(t) = r(t) qJC qJC = 4.16C/W MAX qJC = 3.5C/W TYP D CURVES APPLY FOR POWER PULSE TRAIN SHOWN READ TIME AT t1 TJ(pk) - TC = P(pk) qJC(t) 0.02 0.03 0.05 0.1 0.2 0.3 0.5 1.0 2.0 3.0 5.0 10 20 30 50 P(pk)
0.1 0.07 0.05 0.03 0.02 0.01 0.01
t1
t2
DUTY CYCLE, D = t1/t2 100 200 300 500 1000
t, TIME or PULSE WIDTH (ms)
Figure 5. Thermal Response
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3
BD237 (NPN), BD234 (PNP), BD238 (PNP)
PACKAGE DIMENSIONS
TO-225 CASE 77-09 ISSUE Z
-B- U Q
F M
C
-A-
123
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. 077-01 THRU -08 OBSOLETE, NEW STANDARD 077-09. INCHES MIN MAX 0.425 0.435 0.295 0.305 0.095 0.105 0.020 0.026 0.115 0.130 0.094 BSC 0.050 0.095 0.015 0.025 0.575 0.655 5_ TYP 0.148 0.158 0.045 0.065 0.025 0.035 0.145 0.155 0.040 --- MILLIMETERS MIN MAX 10.80 11.04 7.50 7.74 2.42 2.66 0.51 0.66 2.93 3.30 2.39 BSC 1.27 2.41 0.39 0.63 14.61 16.63 5 _ TYP 3.76 4.01 1.15 1.65 0.64 0.88 3.69 3.93 1.02 ---
H
K
V G S D 2 PL 0.25 (0.010)
M
J R 0.25 (0.010) A
M
A
M
M
B
M
B
M
DIM A B C D F G H J K M Q R S U V
STYLE 1: PIN 1. EMITTER 2. COLLECTOR 3. BASE
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4
BD237/D

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