Page 1
Features
STD845DN40
Dual NPN high voltage transistors in a single package
Preliminary data
■ Low V
■
CE(sat)
Simplified circuit design
■ Reduced component count
■ Fast switching speed
Applications
■ Compact fluorescent lamp (CFL) 220 V mains
■ Electronic ballast for fluorescent lighting
Description
The device is a dual NPN high voltage power
transistor manufactured using multi-epitaxial
planar technology. It is housed in dual-island DIP8 package with separated terminals to provide a
high degree of assembly flexibility.
8
4
1
DIP-8
Figure 1. Internal schematic diagram
Table 1. Device summary
Order code Marking Package Packaging
STD845DN40 D845DN40 DIP-8 Tube
April 2010 Doc ID 17211 Rev 2 1/10
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
www.st.com
10
Page 2
Electrical ratings STD845DN40
1 Electrical ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
V
V
I
I
P
T
Collector-base voltage (IE = 0) 700 V
CBO
Collector-emitter voltage (IB = 0) 400 V
CEO
Emitter-base voltage (IC = 0, IB = 2 A, tp < 10 ms) V
EBO
I
Collector current 4 A
C
Collector peak current (tP < 5 ms) 8 A
CM
Base current 2 A
I
B
Base peak current (tP < 5 ms) 4 A
BM
Total dissipation at T
TOT
Total dissipation at T
Storage temperature -65 to 150 °C
STG
Max. operating junction temperature 150 °C
T
J
= 25 °C single transistor 3 W
amb
= 25 °C both transistors 2.4 W
amb
(BR)EBO
Table 3. Thermal data
Symbol Parameter Value Unit
Thermal resistance junction-ambient (Single transistor) 42 °C/W
(1)
R
thJA
1. Device mounted on PCB area of 25 mm².
Thermal resistance junction-ambient (Both transistors) 52 °C/W
V
2/10 Doc ID 17211 Rev 2
Page 3
STD845DN40 Electrical characteristics
2 Electrical characteristics
T
= 25 °C unless otherwise specified.
case
Table 4. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
I
I
CEO
V
(BR)EBO
V
CEO(sus)
V
CE(sat)
V
BE(sat)
h
CES
FE
V
= 700 V
Collector cut-off
current (V
BE
= 0)
Collector cut-off
current (IB = 0)
V
CE
V
= 700 V Tc = 125 °C
CE
= 400 V 250 µA
V
CE
Emitter-base
breakdown voltage
= 0)
(I
C
= 10 mA 9 18 V
I
E
Collector-emitter
(1)
sustaining voltage
= 0)
(I
B
= 100 mA 400 V
I
C
IC = 0.5 A IB = 0.1 A
= 1 A IB = 0.2 A
Collector-emitter
(1)
saturation voltage
I
C
= 2.5 A IB = 0.5 A
I
C
IC = 4 A IB = 1 A 0.5
= 0.5 A IB = 0.1 A
I
Base-emitter
(1)
saturation voltage
(1)
DC current gain
Diode forward voltage IF = 2 A 2.5 V
F
C
IC = 1 A IB = 0.2 A
= 2.5 A IB = 0.5 A
I
C
I
= 10 mA V
C
= 2 A V
I
C
= 5 V
CE
= 5 V1012 32
CE
100
500µAµA
0.7
1.5
V
1
V
V
V
1.1
1.2
1.3
V
V
V
Resistive load
t
s
t
f
Storage time
Fall time
Inductive load
t
s
t
1. Pulse test: pulse duration ≤ 300 µs, duty cycle ≤ 2 %.
f
Storage time
Fall time
= 2 A
I
C
= - I
I
B(on)
= 125 V tp = 30 µs
V
CC
= 2 A, V
I
C
V
BE(off)
= 0, L = 200 µH
R
BB
B(off)
CC
= - 5 V I
= 400 mA
= 200 V
B(on)
= 400 mA
2.5
0.2
0.6
0.1
µs
µs
µs
µs
Doc ID 17211 Rev 2 3/10
Page 4
Electrical characteristics STD845DN40
2.1 Electrical characteristics (curves)
Figure 2. DC current gain (V
Figure 4. Collector-emitter saturation voltage Figure 5. Base-emitter saturation voltage
= 1.5 V) Figure 3. DC current gain (VCE = 5 V)
CE
Figure 6. Inductive load fall time Figure 7. Inductive load storage time
4/10 Doc ID 17211 Rev 2
Page 5
STD845DN40 Electrical characteristics
Figure 8. Resistive load fall time Figure 9. Resistive load storage time
Figure 10. Reverse biased safe operating area
Doc ID 17211 Rev 2 5/10
Page 6
Test circuits STD845DN40
3 Test circuits
Figure 11. Resistive load switching test circuit
1. Fast electronic switch
2. Non-inductive resistor
Figure 12. Inductive load switching test circuit
1. Fast electronic switch
2. Non-inductive resistor
3. Fast recovery rectifier
6/10 Doc ID 17211 Rev 2
Page 7
STD845DN40 Package mechanical data
4 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Table 5. DIP-8 mechanical data
mm.
Dim.
Min. Typ. Max.
A 4.80
A1 0.50
A2 3.10 3.50
A3 1.40 1.60
b 0.38 0.55
b1 0.38 0.51
b2 1.47 1.57
b3 0.89 1.09
c 0.21 0.35
c1 0.20 0.30
D 9.10 9.30
D1 0.13
E 7.62 8.25
E1 6.25 6.45
e2.54
eA 7.62
eB 7.62 10.90
eC 0 1.52
L 2.92 3.81
Doc ID 17211 Rev 2 7/10
Page 8
Package mechanical data STD845DN40
Figure 13. Drawing dimension DIP-8
8/10 Doc ID 17211 Rev 2
8145726_A
Page 9
STD845DN40 Revision history
5 Revision history
Table 6. Document revision history
Date Revision Changes
03-Mar-2010 1 Initial release.
16-Apr-2010 2 Inserted P
TOT
and R
values Ta bl e 2 and Table 3 on page 2.
thJA
Doc ID 17211 Rev 2 9/10
Page 10
STD845DN40
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10/10 Doc ID 17211 Rev 2
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