SANYO TN8D51A

TN8D51A
Ordering number : ENA0985
SANYO Semiconductors
DATA SHEET
ExPD (Excellent-Performance Power & RF Device)
TN8D51A
Separately-Excited Step-Down
Switching Regulator
(12V Output type)
Features
•
•
•
•
•
•
High efficiency (ON resistance 80mΩ, Vertical-type P-ch Power MOSFET).
Over current protection (Self recovery type).
Under voltage protection.
Over temperature protection function (Self recovery type).
Soft start function (Variable subject to externally-connected capacitor).
Stand-by mode function (Compatible with soft start terminal).
Specifications
Absolute Maximum Ratings at Ta=25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum Input Voltage
VIN max
57
Maximum Output Current
IO max
8
A
Drain-to-Source Voltage of built-in MOSFET
VDSS
--60
V
Drain Current of built-in MOSFET (DC)
FB Pin Maximum Input Voltage
ID
IDP
Vfb
SS Pin Maximum Input Voltage
VSS
Drain Current of built-in MOSFET (Pulse)
Allowable Power Dissipation
PD
Operating Temperature
Topr
Junction Temperature
Tj
Storage Temperature
Tstg
PW≤10μs, duty cycle≤1%
Tc=25°C
V
--12
A
--48
A
15
V
7
V
2.0
W
20
W
--25 to +125
°C
150
°C
--55 to +150
°C
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
www.semiconductor-sanyo.com/network
90308IQ TI IM TC-00001590 No. A0985-1/11
TN8D51A
Recommend Operating Conditions
Parameter
Symbol
Input Voltage
Output Current
Operating Temperature Range
Conditions
Ratings
Unit
VIN
Ta=25°C
20 to 48
V
IOUT
Topr rec
Ta=25°C
0 to 8
A
--10 to +85
°C
Electrical Characteristics at Ta=25°C, See Specified Test Circuit
Parameter
Symbol
Output Voltage
Conditions
VOUT
Efficiency
η
Drain-to-Source Breakdown Voltage
V(BR)DSS
of built-in MOSFET
Drain-to-Source On Resistance
RDS(on)
of built-in MOSFET
Switching Frequency
Freq
11.7
ID=--1mA, VIN,GND,Vfb,VSS=0V
--60
VIN=30V, IOUT=3A
VIN=30V, Vfb=0V
Line Regulation
ΔVline
VIN=20 to 40V, IOUT=3A
ΔVload
VIN=30V, IOUT=0.8 to 8A
ΔVO / ΔTa
Over-Current-Protection-Operation
Iocp
-Threshold Voltage
Under-Voltage-Protection-Operation
-Release Voltage
Under-Voltage-Protection Hysteresis Voltage
Over-Temperature-Protection-Operation
-Threshold-Current *1
Over-Temperature-Protection-Operation
-Release Temperature *1
Over-Temperature-Protection
-Hysteresis Temperature *1
SS Terminal Current
V
%
V
mΩ
120
150
180
88
92
96
kHz
%
130
200
mV
70
100
mV
mV / °C
±1.2
12
16
A
Vuvlo on
7.2
8.0
8.8
V
Vuvlo off
8.1
9.0
9.9
V
Vuvlo hys
1.0
V
Ttsd on
165
°C
Ttsd off
140
°C
Ttsd hys
25
°C
10
μA
ISS
Vstb on
Standby Operating Voltage
12.4
8.1
-Threshold Current
Under-Voltage-Protection-Operation
12.0
80
VIN=30V, IOUT=3A, Ta= --25 to +125°C
VIN=30V
Unit
max
92
ISW=5A
Duty max
Output Voltage Temperature Coefficient *1
typ
VIN=30V, IOUT=3A
VIN=30V, IOUT=3A
Maximum Duty
Load Regulation
Ratings
min
Standby Current
Istb
VIN=30V
VIN=30V
VIN=30V, VSS=0V
0.3
V
500
μA
Note: the values with "*1" are our targeted values, but not guaranteed.
Package Dimensions
unit : mm (typ)
7527-001
10.0
4.5
3.2
1.6
16.0
7.2
3.5
2.8
1
2
3
4
(5.9)
0.9
0.5
12.5
14.0
2.4
5
1.27
0.7
3.81
2.54
1.27
2.54
2.75
1 : VIN
2 : GND
3 : SWOUT
4 : FB
5 : SS
SANYO : TO-220FI5H-HB
No. A0985-2/11
TN8D51A
Block Diagram
VIN 1
3 SWOUT
Under
Voltage
Protect
Over
Temperature
Protect
Over Current
Protect
SENSE
Pch MOSFET
OUTPUT
-COMP
+
OSC
SS 5
SOFTSTART
Band Gap
+
--
AMP
4 FB
GND 2
Pin Functions
Pin No.
Symbol
1
VIN
Power Supply Input (Maximum 57V)
Function
2
GND
GND
3
4
SWOUT
FB
5
SS
Pulse Voltage Output
Feedback from Output Voltage
For Soft Start Capacitor Connection and Standby Mode Switching
Application Circuit Example
1 VIN
SWOUT 3
VOUT
VIN
5 SS
+
FB 4
+
2 GND
GND
GND
No. A0985-3/11
TN8D51A
Forward Bias A S O
IDP= --48A
Drain Current, ID -- A
3
2
<10μs
10
μs
10
0μ
s
ID= --12A
1m
--10
7
5
3
2
DC
10
3
2
ms
0m
s
op
era
Operation in
this area is
limited by RDS(on).
--1.0
7
5
s
10
tio
n
Tc=25°C
Single pulse
--0.1
--0.1
2
3
2.0
No
1.5
he
at
sin
k
1.0
0.5
0
5 7 --1.0
2
3
5 7 --10
2
3
5 7 --100
IT13084
Drain-to-Source Voltage, VDS -- V
0
20
40
60
80
100
120
Ambient Temperature, Ta -- °C
140
160
IT12620
PD -- Tc
25
Allowable Power Dissipation, PD -- W
PD -- Ta
2.5
Allowable Power Dissipation, PD -- W
--100
7
5
20
15
10
5
0
0
20
40
60
80
100
120
140
Case Temperature, Tc -- °C
160
IT12671
Specified Circuit for Electrical Characteristics
[Circuit]
L1
IC1
VIN
VOUT
R3
1 2 3 4 5
+
C1
+
C3
GND
D1
C2
C6
GND
IT12637
[Components]
Symbol
Component
Specification
C1
Electrolytic Capacitor
3000 to 3600μF
C2
Electrolytic Capacitor
2000 to 2200μF
C3
Capacitor
0.1μF
C6
Ceramic Capacitor
1000pF
R3
Metal Oxide Film Resistor
47Ω / 2W
L1
Choke Coil
100μH
D1
Schottky Barrier Diode
SBT250-06J
* When measuring ripple noise voltage, put 47μF (electrolytic capacitor) and 0.1μF (ceramic or film capacitor) into measuring point.
No. A0985-4/11
TN8D51A
Evaluation Board
[Circuit]
L1
F1
VIN
IC1
FUSE
R3
C4
R1
VOUT
1 2 3 4 5
+
C1A
+
C1B
+
C1C
+ C2A
C3
D1
C6
C5
R2
GND
GND
IT12638
[Components]
Symbol
F1
Component
Specification
Maker
Remark
Fuse
4A
Littelfuse
452 004
C1A
Electrolytic Capacitor
1200μF / 80V
Nippon Chemi-Con Corp.
KZE
C1B
Electrolytic Capacitor
1200μF / 80V
Nippon Chemi-Con Corp.
KZE
C1C
Electrolytic Capacitor
1200μF / 80V
Nippon Chemi-Con Corp.
KZE
C2A
Electrolytic Capacitor
2200μF / 35V
SANYO Electronic Co., Ltd.
MV
C3
Film Capacitor
0.1μF / 100V
Matsushita Electronic Components Corp.
ECQ-B
C4
N.C.
1000pF
Murata Manufacturing Co., Ltd.
C5
N.C.
C6
Ceramic Capacitor
R1
Jumper Line
R2
N.C.
R3
Metal Oxide Film Resistor
47Ω / 2W
Matsushita Electronic Components Corp.
L1
Choke Coil
HK-12S120-1010
TOHO ZINC CO.,LTD.
D1
Schottky Barrier Diode
SBT250-06J
SANYO Semiconductor Co., Ltd.
100μH
No. A0985-5/11
TN8D51A
Recommended PCB Pattern
TO-220FI5H-HB Specification Silk Printing (Top View)
TO-220FI5H-HB Specification Pattern (Perspective View)
No. A0985-6/11
TN8D51A
Output Voltage -- Output Current
12.4
Efficiency -- Output Current
100
VIN=20V
40V
90
12.2
12.1
Efficiency -- %
Output Voltage -- V
12.3
VIN=40V
12.0
30V
11.9
20V
30V
80
70
11.8
60
11.7
0
2
4
6
Output Current -- A
14
0
8
4
6
8
Output Current -- A
Characteristic of Output Current Protection
IT13261
Output Voltage -- Input Voltage
12.4
VIN=40V
12
2
IT13260
12.3
10
Output Voltage -- V
Output Voltage -- V
20V
8
6
4
12.1
=3A
I OUT
8A
12.0
11.9
11.8
2
0
0
2
4
6
8
10
12
14
Output Current -- A
11.7
16
0
10
20
30
40
60
IT13262
Power Loss -- Input Voltage
16
14
6
12
Power Loss -- W
5
IO
U
4
T=
8A
3
2
=8A
I OUT
10
8
6
4
3A
3A
1
2
0
0
0
10
20
30
40
50
Input Voltage -- V
60
0
10
20
30
40
180
VIN=30V
Oscillation Frequency -- kHz
12.3
12.1
IOUT =3A
12.0
11.9
170
160
3A
I OUT=
150
140
130
11.8
11.7
--25
60
IT13264
Oscillation Frequency -- Tc
VIN=30V
12.2
50
Input Voltage -- V
IT13263
Output Voltage -- Tc
12.4
Output Voltage -- V
50
Input Voltage -- V
IT13319
Input Current -- Input Voltage
7
Input Current -- A
12.2
0
25
50
Case Temperature, Tc -- °C
75
100
IT13265
120
--25
0
25
50
Case Temperature, Tc -- °C
75
100
IT13266
No. A0985-7/11
TN8D51A
Input Reduced-Voltage Characteristic
14
Output Voltage -- V
13
IOUT=3A
12
8A
11
10
9
0
5
10
15
20
25
Input Voltage -- V
30
IT13267
Output Voltage Rising Characteristic
IOUT=3A
Output Voltage Falling Characteristic
Input voltage: VIN=30V
IOUT=3A
Input voltage: VIN=30V
5V / div
20ms
Output voltage: VOUT=12V
ON
Input / Output Voltage -- V
Input / Output Voltage -- V
5V / div
20ms
Output voltage: VOUT=12V
IT12697
IT12698
Output Voltage Rising Characteristic
IOUT=8A
Output voltage: VOUT=12V
ON
2V / div
Input / Output Voltage -- V
5V / div
20ms
Capacitance of Soft Start Capacitor -Output Voltage Rising Characteristic
IT12699
20ms
Output voltage: VOUT=12V
Capacitance of Soft Start Capacitor -Output Voltage Rising Characteristic
2V / div
Output voltage: VOUT=12V
IT12700
Output voltage: VOUT=12V
10ms
Output Voltage -- V
10ms
Output Voltage -- V
IOUT=8A
Input voltage: VIN=30V
Input voltage: VIN=30V
5V / div
Input / Output Voltage -- V
Output Voltage Falling Characteristic
C=0.01μF
C=0.1μF
C=0.22μF
ON
C=0.01μF
C=0.1μF
C=0.22μF
ON
VIN=30V
IOUT=3A
VIN=30V
IOUT=8A
IT12701
IT12702
No. A0985-8/11
TN8D51A
Example of Over-voltage Protection Circuit.
Generally, in constant-voltage power supply circuit, output voltage will become higher than the specified value (overvoltage state) in case of any failures or PC board solderability defects. To minimize the damage caused by this over
voltage, we recommend setting an over-voltage protection circuit.
In designing, the following confirmations are necessary in actual circuit.
1) How the over-voltage protection circuit operates and its effects.
2) Is there any malfunction due to ambient temperature change of each device or exogenous noises?
Over-voltage Protection Circuit Example
F1
VIN
Constant-voltage
power supply
FUSE
VOUT
ZD
THYRISTOR
C
R
GND
GND
IT12639
Example of Over-voltage Protection Circuit
The thyristor will operate when it accept an over-voltage (VOUT) signal, then the fuse is melted and the input power is cut
off, then the operation of IC1 is stopped.
F1
VIN
IC1
FUSE
VOUT
THYRISTOR
1 2 3 4 5
+
+
C
GND
ZD
R
GND
IT12640
Continued on next page.
No. A0985-9/11
TN8D51A
Continued from preceding page.
SS terminal (5 pin) also acts as standby mode switch. By setting SS terminal (5 pin) voltage to be equal or less than
0.3Vtyp, the output ON/OFF is able to be controlled by external signals.
ON/OFF Control Circuit Example
F1
VIN
IC1
FUSE
VOUT
1 2 3 4 5
+
+
NPN
GND
Signal
GND
IT12641
In addition, confirmation of the following points is necessary in actual circuit.
1) How the output ON/OFF control operates and its effects.
2) Is there any malfunction due to the ambient temperature change of each device or exogenous noises?
Points to Remember in Pattern Designing
1) Transient large current flows to VIN terminal (1 pin), so we recommend the input capacitor should be 3000μF and
above. In addition, (+) (-) terminals of the input capacitor should be set near to VIN terminal (1 pin) and GND
terminal (2 pin).
2) Large current flows to C1A to C, VIN terminal (1 pin) of IC1, SWOUT terminal (3 pin), D1, L1, and C2A. So, the
wiring should be thick and short.
3) FB terminal (4 pin) of IC1 is the feedback terminal from output voltage. It should be near to the output capacitor
C2A.
•
For the purpose of ensuring the stability of oscillation, a capacitor should be inserted between SS terminal (5 pin) and
GND terminal (2 pin).
•
The absolute maximum rated voltage of SS terminal (5 pin) is 7V. The absolute maximum rated voltage of FB
terminal (4 pin) is within the range of 5 to 30V according to the output voltage type. When a voltage equal or
higher than the rated value is applied to SS terminal (5 pin) or FB terminal (4 pin) in some cases such as abnormal
test, protection measures like inserting fuses should be taken.
•
The built-in over-heat protection is a function to prevent the circuit from overheat state caused by transient
temperature rise, but not a function to prevent from abnormal caused by a sudden heat generation. In addition,
the reliability of over-heat protection function is not guarantee.
No. A0985-10/11
TN8D51A
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require the
export license from the authorities concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise,
without the prior written consent of SANYO Semiconductor Co.,Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellectual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of September, 2008. Specifications and information herein are subject
to change without notice.
PS No. A0985-11/11