Data Sheet

TEA1705
GreenChip SMPS transient controller
Rev. 2 — 12 December 2013
Product data sheet
1. General description
The TEA1705 is a secondary side IC to be used in Switched Mode Power Supplies
(SMPS) with high power density. The device offers excellent transient response in primary
controlled systems of NXP Semiconductors, with ultra-low no-load power and minimum
sized output capacitors. The TEA1705 is intended to be used in power supplies and
battery chargers with 5 V output. The TEA1705 operates in combination with the NXP
Semiconductors primary-side controller like the TEA1720xT. The output voltage is
continuously monitored and when the output voltage is below the Vdet level, a transient
interrupt signal is generated. This signal is transmitted via the transformer to the primary
side to wake up the primary controller. This system reduces the volume of the output
capacitors, minimizing the BOM cost. It also enables the building of compact chargers.
2. Features and benefits
 Excellent transient performance with ultra-low no-load power and smallest output
capacitors
 Fast detection of a decreasing output voltage during load steps
 Integrated output voltage clamp function
 Device available in small SOT23 package
3. Applications
 Battery chargers for smart phones and media tablets
 Standby supply for TV and desktop PC
4. Ordering information
Table 1.
Ordering information
Type number
TEA1705/1
Package
Name
Description
Version
TO-236AB
plastic surface-mounted package; 3 leads
SOT23
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
5. Marking
Table 2.
Marking codes
Type number
Marking code[1]
TEA1705
%4U
[1]
% = placeholder for manufacturing site code
6. Block diagram
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Fig 1.
DDD
TEA1705 block diagram
7. Pinning information
7.1 Pinning
3
1
2
006aaa144
Fig 2.
TEA1705
Product data sheet
TEA1705 pin configuration
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
2 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
7.2 Pin description
Table 3.
Pin description
Symbol
Pin
Description
VCC
1
supply voltage
CAP
2
connection for communication capacitor
GND
3
ground
8. Functional description
8.1 Start-up
The TEA1705 starts up when a supply voltage is applied to the VCC pin. When the VCC
voltage exceeds the Vstartup level the IC is enabled. The IC stays in this mode until the
VCC voltage drops below the VCC(stop) level. All detection voltages on the VCC pin are
derived from an integrated temperature compensated band gap voltage.
8.2 Detection
During the switching of the primary controller in the flyback application, the capacitor
connected between the secondary winding of the transformer and the CAP pin is charged.
The capacitor is charged using the body diode of the integrated switch. The switching of
the primary side is monitored using a circuit on the CAP pin of the TEA1705.
When the switching has stopped for tblank and the monitored VCC voltage is lower than
the Vdet level, the integrated switch is turned on for a duration of ton. The external
capacitor discharges through the secondary transformer winding. On the primary side of
the transformer a wake-up pulse is detected by using a primary control IC like the
TEA1720xT. The primary IC exits the energy save state and starts to deliver output power.
8.3 MOSFET-switch
Generating the transient interrupt signal is enabled by using an internal MOSFET-switch
between the CAP and GND pins to discharge the external capacitor. The integrated body
diode of this switch is used to charge the external capacitor when the primary switch in the
flyback application is switching again.
8.4 Clamp
An integrated clamp function is present on the VCC pin. If the voltage on the VCC pin
exceeds Vclamp(VCC), the clamp circuit drains away the current. The clamp circuit has an
impedance of Rclamp. It helps to prevent an overvoltage on the output capacitors.
TEA1705
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
3 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
9. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).All voltages are measured
with respect to GND; positive currents flow into the IC. The voltage ratings and current ratings are
valid provided the other ratings are not violated.
Symbol
Parameter
Conditions
Min
Max
Unit
Voltages
VCC
supply voltage
0.3
+7
V
VCAP
voltage on pin CAP
-
+50
V
Currents
ICC
supply current
ICAP
current on pin CAP
0
50
mA
Repetitive;
pulse width  1 s;
repetition time  50 s
2.5
+2.5
A
Non-repetitive;
pulse width  1 s
3.5
-
A
-55
+150
C
General
Tstg
storage temperature
Tj
junction temperature
VESD
electrostatic discharge
voltage
[1]
40
+150
C
human body model[1]
2000
+2000
V
Charged device model
500
+500
V
Equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor.
10. Thermal characteristics
Table 5.
Symbol
Parameter
Conditions
Rth(j-a)
thermal resistance from junction
to ambient
in free air
[1]
TEA1705
Product data sheet
Thermal characteristics
[1]
Typ
Unit
300
K/W
Device mounted on an FR-4 Printed-Circuit Board (PCB), single-sided copper, tin-plated and standard
footprint.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
4 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
11. Characteristics
Table 6.
Characteristics
VCC = 5 V; Tamb = 25 C; all voltages referenced to GND; positive currents flow into the IC, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VCAP = 50 V
-
-
1
A
High voltage (pin CAP)
Ileak(CAP)
leakage current on pin CAP
Supply (pin VCC)
Vstartup
start-up voltage
4.3
4.4
4.5
V
VCC(stop)
stop supply voltage
3.9
4.0
4.1
V
VCC(hys)
hysteresis of supply voltage
VCC(hys) = Vstartup  VCC(stop)
0.35
0.4
0.45
V
ICC
supply current
VCC = 5.5 V; current decreases slightly
at lower supply voltages
85
97
110
A
4.8
4.9
5.0
V
-
1.1
-
s
ICAP = 100 mA
-
2
-

VCC = 4.8 V; after last primary stroke
-
65
-
s
clamp start voltage; IVCC = 1 mA
5.80
5.92
6.05
V
differential measurement between
VCC = 7 V and VCC = Vclamp(VCC)
-
26
-

Detection (pin VCC)
Vdet
detection voltage
Switch (pin CAP)
ton
on-time
Ron
on-state resistance
Timer (pin CAP)
tblank
blanking time
Clamp (pin VCC)
Vclamp(VCC) clamp voltage on pin VCC
Rclamp
clamp resistance
TEA1705
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
5 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
12. Application information
A switched mode power supply application, using the TEA1705 transient controller is
shown in Figure 3. On the secondary side the output voltage is monitored by the
TEA1705. The TEA1705 works in combination with a primary-side controller.
See for more information the TEA1720xT data sheets.
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Fig 3.
Application diagram
TEA1705
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
6 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
13. Package outline
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Package outline SOT23
TEA1705
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
7 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
14. Revision history
Table 7.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
TEA1705 v.2
20131212
Product data sheet
-
TEA1705 v.1
Modifications:
TEA1705 v.1
TEA1705
Product data sheet
•
The data sheet status has changed from preliminary to product.
20131203
Preliminary data sheet
-
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
-
© NXP B.V. 2013. All rights reserved.
8 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
15. Legal information
15.1 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.
15.2 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.
15.3 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.
TEA1705
Product data sheet
Suitability for use — NXP Semiconductors products are 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.
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.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
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TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
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.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors’ warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors’ specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
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.
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
GreenChip — is a trademark of NXP B.V.
16. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
TEA1705
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
10 of 11
TEA1705
NXP Semiconductors
GreenChip SMPS transient controller
17. Contents
1
2
3
4
5
6
7
7.1
7.2
8
8.1
8.2
8.3
8.4
9
10
11
12
13
14
15
15.1
15.2
15.3
15.4
16
17
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 1
Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pinning information . . . . . . . . . . . . . . . . . . . . . . 2
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functional description . . . . . . . . . . . . . . . . . . . 3
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MOSFET-switch . . . . . . . . . . . . . . . . . . . . . . . . 3
Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4
Thermal characteristics . . . . . . . . . . . . . . . . . . 4
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Application information. . . . . . . . . . . . . . . . . . . 6
Package outline . . . . . . . . . . . . . . . . . . . . . . . . . 7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . 8
Legal information. . . . . . . . . . . . . . . . . . . . . . . . 9
Data sheet status . . . . . . . . . . . . . . . . . . . . . . . 9
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Contact information. . . . . . . . . . . . . . . . . . . . . 10
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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. 2013.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 12 December 2013
Document identifier: TEA1705