Data Sheet

SO
T4
57
NCR401U
10 mA LED driver in SOT457
Rev. 1 — 20 February 2014
Product data sheet
1. Product profile
1.1 General description
LED driver consisting of resistor-equipped PNP transistor with two diodes on one chip in
an SOT457 (SC-74) plastic package.
1.2 Features and benefits







Stabilized output current of 10 mA
High current accuracy at supply voltage variation
Low voltage overhead of 1.4 V
Qualified according to AEC-Q101
Reduces component count and board space
High power dissipation of 750 mW
Stabilized output current adjustable up to 65 mA when an external resistor is used
1.3 Applications
 Constant current LED driver
 Generic constant current source
 Automotive applications
1.4 Quick reference data
Table 1.
Quick reference data
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Iout
stabilized output current
VS = 10 V; Vout = 8.6 V
8.5
10
11.5
mA
VS
supply voltage
-
-
40
V
NCR401U
NXP Semiconductors
10 mA LED driver
2. Pinning information
Table 2.
Pinning
Pin
Symbol
Description
Simplified outline
1
GND
ground
2
IOUT
output current
3
IOUT
output current
4
VS
supply voltage
5
IOUT
output current
6
REXT
external resistor
6
5
4
1
2
3
Graphic symbol
6
5
1
2
4
3
aaa-010101
3. Ordering information
Table 3.
Ordering information
Type number
NCR401U
Package
Name
Description
Version
SC-74
(TSOP6)
plastic surface-mounted package; 6 leads
SOT457
4. Marking
Table 4.
NCR401U
Product data sheet
Marking codes
Type number
Marking code
NCR401U
DA
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5. Limiting values
Table 5.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Iout
Conditions
Min
Max
Unit
stabilized output current if
external resistor is used
-
65
mA
VS
supply voltage
-
40
V
Vout
output voltage
VS = 40 V
-
38
V
[1]
-
0.5
V
Tamb  25 C
[2]
-
475
mW
Tamb  25 C
[3]
-
650
mW
Tamb  25 C
[4]
-
750
mW
Tamb  25 C
[5]
-
1100
mW
reverse voltage
VR
total power dissipation
Ptot
Tj
junction temperature
-
150
C
Tamb
ambient temperature
55
+150
C
Tstg
storage temperature
65
+150
C
[1]
Between all terminals.
[2]
Device mounted on an FR4 Printed-Circuit Board (PCB); single-sided copper; tin-plated and standard
footprint.
[3]
Device mounted on an FR4 PCB; single-sided copper; tin-plated and mounting pad for output 1 cm2.
[4]
Device mounted on an FR4 PCB; 4-layer copper; tin-plated and standard footprint.
[5]
Device mounted on an FR4 PCB; 4-layer copper; tin-plated and mounting pad for output 1 cm2.
aaa-010053
1
Ptot
(W)
0.8
(1)
0.6
(2)
0.4
0.2
0
-75
-25
25
75
125
175
Tamb (°C)
(1) FR4 PCB, 4-layer copper; standard footprint.
(2) FR4 PCB, single-sided copper; standard footprint.
Fig 1.
NCR401U
Product data sheet
Power derating curve
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10 mA LED driver
6. Thermal characteristics
Table 6.
Thermal characteristics
Symbol
Parameter
Conditions
thermal resistance from junction
to ambient
Rth(j-a)
thermal resistance from junction
to solder point
Rth(j-sp)
in free air
Min
Typ
Max
Unit
[1]
-
-
265
K/W
[2]
-
-
190
K/W
[3]
-
-
165
K/W
[4]
-
-
115
K/W
-
-
50
K/W
in free air
[1]
Device mounted on an FR4 PCB; single-sided copper; tin-plated and standard footprint.
[2]
Device mounted on an FR4 PCB; single-sided copper; tin-plated and mounting pad for output 1 cm2.
[3]
Device mounted on an FR4 PCB; 4-layer copper; tin-plated and standard footprint.
[4]
Device mounted on an FR4 PCB; 4-layer copper; tin-plated and mounting pad for output 1 cm2.
aaa-010054
103
Zth(j-a)
(K/W)
102
duty cycle = 1
0.75
0.5
0.33
0.2
0.1
10
0.05
0.02
0.01
0
1
-5
10
10-4
10-3
10-2
10-1
1
10
102
tp (s)
103
FR4 PCB, single-sided copper, standard footprint
Fig 2.
Transient thermal impedance from junction to ambient as a function of pulse duration; typical values
NCR401U
Product data sheet
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10 mA LED driver
aaa-010055
103
Zth(j-a)
(K/W)
102
duty cycle = 1
0.75
0.5
0.33
0.2
0.1
10
0.05
0.02
0.01
0
1
10-5
10-4
10-3
10-2
10-1
1
10
102
tp (s)
103
FR4 PCB, 4-layer copper, standard footprint
Fig 3.
Transient thermal impedance from junction to ambient as a function of pulse duration; typical values
NCR401U
Product data sheet
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10 mA LED driver
7. Characteristics
Table 7.
Characteristics
Tamb = 25 C; pulse test: tP  300 s;  = 0.02; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Iout
stabilized output current
VS = 10 V; Vout = 8.6 V
8.5
10
11.5
mA
IGND
ground current
VS = 10 V; Iout = 0 A
340
420
500
A
Rint
internal resistance
IRint = 10 mA
75
88
101

VRint
voltage drop at internal
resistance Rint
Iout = 10 mA
-
0.88
-
V
VSmin
lowest sufficient supply
voltage overhead VS  Vout
Iout > 8.5 mA
-
1.4
-
V
Iout / (Iout  Tamb) stabilized output current
change over ambient
temperature
VS = 10 V; Vout = 8.6 V
-
0.3
-
%/K
Iout / (Iout  VS)
VS = 10 V;
VS  Vout = 1.4 V
-
0.8
-
%/V
stabilized output current
change over supply voltage
aaa-011467
102
aaa-010057
2.4
(1)
(2)
IGND
(mA)
(3)
Iout
(mA)
(4)
Tamb = 80 °C
(5)
1.6
(6)
Tamb = 25 °C
(7)
10
0.8
Tamb = -40 °C
1
0
10
20
30
VS (V)
0
40
VS  Vout = 1.4 V; Tamb = 25 C
0
10
20
30
VS (V)
40
Iout = 0 mA
(1) Rext = 15 
(2) Rext = 18 
(3) Rext = 22 
(4) Rext = 33 
(5) Rext = 47 
(6) Rext = 100 
(7) Rext = open
Fig 4.
Output current as a function of supply voltage;
typical values
NCR401U
Product data sheet
Fig 5.
Ground current as a function of supply
voltage; typical values
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10 mA LED driver
aaa-011468
12
aaa-011470
102
VS - Vout = 1.4 V -2 V
Iout
(mA)
11
Iout
(mA)
10
(1)
VS - Vout = 1 V
(2)
10
(3)
(4)
9
8
7
0
10
20
30
VS (V)
1
40
Rext = open; Tamb = 25 C
0
10
20
30
VS (V)
40
VS  Vout = 1.4 V; Rext = open
(1) Tamb = 40 C
(2) Tamb = +25 C
(3) Tamb = +80 C
(4) Tamb = +150 C
Fig 6.
Output current as a function of supply voltage;
typical values
Fig 7.
Output current as a function of supply voltage;
typical values
aaa-011471
102
Iout
(mA)
(1)
(2)
(3)
(4)
10
0
50
100
150
Rext (Ω)
200
VS = 10 V; Vout = 8.6 V
(1) Tamb = 40 C
(2) Tamb = +25 C
(3) Tamb = +85 C
(4) Tamb = +150 C
Fig 8.
Output current as a function of external resistor; typical values
NCR401U
Product data sheet
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10 mA LED driver
8. Application information
Figure 9 shows a typical application circuit for an LED driver. The constant current
ensures a constant LED brightness. The output current can be adjusted between 10 mA
and 65 mA by connecting an external resistor Rext. Figure 8 gives a first indication for
choosing the external resistor Rext. The output current slightly decreases when the power
load at LED driver increases. This effect is due to the self heating of the device and the
negative thermal coefficient of the output current.
VS
VCC
Rint
Rext
REXT
IOUT
Iout
LED
GND
aaa-010022
Fig 9.
LED driver application diagram
The output can be switched ON and OFF by connecting a Resistor-Equipped Transistor
(RET), e.g. PDTC124XU; see Figure 10.
VS
VCC
Rext
REXT
IOUT
GND
Iout
OUT
IN /
OUT
LED
GND
006aaa025
Fig 10. Switching the current ON/OFF; application diagram
NCR401U
Product data sheet
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10 mA LED driver
9. Test information
9.1 Quality information
This product has been qualified in accordance with the Automotive Electronics Council
(AEC) standard Q101 - Stress test qualification for discrete semiconductors, and is
suitable for use in automotive applications.
NCR401U
Product data sheet
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Rev. 1 — 20 February 2014
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10 mA LED driver
10. Package outline
Plastic surface-mounted package (TSOP6); 6 leads
D
SOT457
E
B
y
A
HE
6
5
X
v M A
4
Q
pin 1
index
A
A1
c
1
2
3
Lp
bp
e
w M B
detail X
0
1
2 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
A1
bp
c
D
E
e
HE
Lp
Q
v
w
y
mm
1.1
0.9
0.1
0.013
0.40
0.25
0.26
0.10
3.1
2.7
1.7
1.3
0.95
3.0
2.5
0.6
0.2
0.33
0.23
0.2
0.2
0.1
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
SOT457
JEITA
SC-74
EUROPEAN
PROJECTION
ISSUE DATE
05-11-07
06-03-16
Fig 11. Package outline SOT457 (SC-74)
NCR401U
Product data sheet
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11. Soldering
3.45
1.95
0.45 0.55
(6×) (6×)
0.95
solder lands
solder resist
3.3 2.825
0.95
solder paste
occupied area
0.7
(6×)
Dimensions in mm
0.8
(6×)
2.4
sot457_fr
Fig 12. Reflow soldering footprint for SOT457 (SC-74)
5.3
1.5
(4×)
solder lands
1.475
0.45
(2×)
5.05
solder resist
occupied area
1.475
Dimensions in mm
preferred transport
direction during soldering
1.45
(6×)
2.85
sot457_fw
Fig 13. Wave soldering footprint for SOT457 (SC-74)
NCR401U
Product data sheet
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Rev. 1 — 20 February 2014
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12. Revision history
Table 8.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
NCR401U v.1
20140220
Product data sheet
-
-
NCR401U
Product data sheet
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13. Legal information
13.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
13.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
13.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
NCR401U
Product data sheet
Suitability for use in automotive applications — This NXP
Semiconductors product has been qualified for use in automotive
applications. Unless otherwise agreed in writing, the product is not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer's own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 20 February 2014
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No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
13.4 Trademarks
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
14. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
NCR401U
Product data sheet
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15. Contents
1
1.1
1.2
1.3
1.4
2
3
4
5
6
7
8
9
9.1
10
11
12
13
13.1
13.2
13.3
13.4
14
15
Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1
General description . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Quick reference data . . . . . . . . . . . . . . . . . . . . 1
Pinning information . . . . . . . . . . . . . . . . . . . . . . 2
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 3
Thermal characteristics . . . . . . . . . . . . . . . . . . 4
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Application information. . . . . . . . . . . . . . . . . . . 8
Test information . . . . . . . . . . . . . . . . . . . . . . . . . 9
Quality information . . . . . . . . . . . . . . . . . . . . . . 9
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 10
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 12
Legal information. . . . . . . . . . . . . . . . . . . . . . . 13
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 13
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Contact information. . . . . . . . . . . . . . . . . . . . . 14
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2014.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 20 February 2014
Document identifier: NCR401U