SSL21151T [NXP]
Low-cost non-dimmable LED driver IC; 低成本的非调光LED驱动器IC
| 型号： | SSL21151T |
| 厂家： | 
NXP |
| 描述： | Low-cost non-dimmable LED driver IC |
| 文件： | 总15页 (文件大小：133K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SSL2115X
Low-cost non-dimmable LED driver IC
Rev. 2 — 7 June 2012
Product data sheet
1. General description
The SSL2115X is a low-cost non-dimmable LED driver IC. It is designed to drive LEDs in
isolated flyback or non-isolated buck-boost topologies. The device includes a high-voltage
power switch and a circuit enabling start-up directly from the rectified mains voltage. It has
a good controlled output current.
2. Features and benefits
Compact solution with a small form factor and a low component count
Ease of integration
Primary side sensing (no optocoupler required)
True current source behavior:
LED current independent of mains voltage, LED voltage and temperature variation
LED current accuracy (10 %)
Line regulation: 3 % at 230 V 10 %
Load regulation: 3 % between 0.5 Umax and 0.85 Umax
Efficiency up to 86 % depending on the application
Power Factor 0.6 or ~0.9 using valley fill
Low ripple current < 1 %
Internal protections:
OverTemperature Protection (OTP)
LED short protection (IOUT (0 V – V maximum) at a constant level)
LED open protection
UnderVoltage LockOut (UVLO)
Internal supply voltage generation enabling start-up from the rectified mains voltage
SO7 package
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
3. Applications
SSL21151 is suitable for applications up to 5 W mains power
SSL21153 is suitable for applications up to 10 W mains power
SSL retrofit lamps (small-sized light bulbs or LED spots)
LED module, mains AC/DC converter (down-lights)
LED strings (retail displays)
4. Quick reference data
Table 1.
Quick reference data
Symbol
VCC
Parameter
Conditions
Min
0.3
13
Typ
-
Max
35
Unit
V
supply voltage
operating range
RDSon
drain-source on-state
resistance
SSL21151;
Tj = 25 C
15.5
17
SSL21153;
3.5
4.8
6
Tj = 25 C
fsw(high)
high switching frequency normal operation
48
50.5
-
53
kHz
A
IM(DRAIN)
peak current on pin
DRAIN
SSL21151
SSL21153
0.7
1.5
2
+0.7
+1.5
+700
+150
A
VDRAIN
Tj
voltage on pin DRAIN
junction temperature
-
V
40
C
5. Ordering information
Table 2.
Ordering information
Type number Package
Name
Description
Version
SSL21151T
SSL21153T
SO7
plastic small package outline body; 7 leads; body width SOT1175-1
3.9 mm
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
2 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
6. Block diagram
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Fig 1. Block diagram SSL2115X
7. Pinning information
7.1 Pinning
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Fig 2. Pin configuration
7.2 Pin description
Table 3.
Symbol
GND1
Pin description
Pin
1
Description
ground
GND2
2
ground
GND3
3
ground
SENSE
VCC
4
transformer status sensing
supply voltage
5
SOURCE
DRAIN
6
source of the internal power switch
drain of the internal power switch
7
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
3 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
8. Functional description
8.1 Introduction
The SSL2115X is an integrated circuit intended for retrofit small form factor SSL lamps. It
provides a controller with an internal high-voltage switch to drive LEDs. It operates directly
from the rectified mains.
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VDRAIN = voltage on pin DRAIN
ton = turn-on time
t
off = turn-off time
VM = peak voltage
Vi = input voltage
N = transformer winding turns ratio
VOUT = output voltage.
Fig 3. Drain switching wave form
8.2 Current source operation
A flyback inductor is calculated using Equation 1:
ILED Umax
L =
(1)
--------------------------------------------------------------------
2
0.85 fswhigh 0.5 Ipk
Where
• is the efficiency of the complete flyback converter
• fsw(high) is the high switching frequency
• Umax the maximum combined voltage of the connected LEDs and the voltage drop of
the output rectifier
• L is the primary inductance of the flyback transformer
• Ipk is the peak current through of the flyback transformer
Vrefhighpk
RSOURCE
Ipk
=
(2)
--------------------------
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
4 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
Where
• Vref(high)pk is the peak high reference voltage
• RSOURCE is the value of the resistor connected to the SOURCE pin
8.3 Leading-Edge Blanking (LEB)
The controller has a fixed LEB of 325 ns to avoid wrong detection of the primary peak
current.
8.4 dV/dt detection
The end of demagnetization is detected when the voltage on the sense pin is <50 mV.
8.5 Turn-off-time (toff)
A blanking time is applied at the beginning of toff during tblank time to observe the
demagnetization.
8.6 Supply concepts VCC and UnderVoltage LockOut (UVLO)
An integrated Junction gate Field-Effect Transistor (JFET), connected to the drain voltage,
provides the start-up current.
The IC starts switching when the voltage on pin VCC exceeds the VCC(startup) level. After
start-up, an external supply is required, which an auxiliary winding connection can
provide. When the voltage on pin VCC drops below the VCC(UVLO) level, the IC stops
switching and is reset.
Design the voltage of the auxiliary winding to ensure that the VCC supply voltage has a
Umax value of 29 V
8.7 Peak current detection
The cycle-by-cycle peak drain current limit circuit uses the external source resistor
RSOURCE to measure the primary peak current. The circuit is activated after the leading
edge blanking time. The protection circuit limits the source voltage over resistor RSOURCE
to Vth(det)SOURCE, thus limiting the primary peak current.
8.8 LED OverTemperature Protection (OTP)
An external temperature dependent resistor can be applied for LED over temperature
protection.
8.9 LED Output Short-circuit Protection (OSP)
When the output short-circuit protection is activated, the IC enters shutdown mode. Only a
power-on reset (switching off the mains voltage) activates normal operation.
8.10 Output LED open-circuit protection
If an open circuit occurs on the LEDs, the output voltage increases at each cycle of the
AC/DC converter. Energy is no longer transferred to the LEDs. The energy accumulated
at the primary side is transferred to the supply of the IC via the auxiliary winding. The IC
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
5 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
limits the VLED when VCC reaches the Vprot(VCC) value. A non-latched application can be
created depending on implementation of a small preload. Without the small preload, the
protection latches.
8.11 Operational limits
The application must stay in Current Control Mode (CCM) for normal functionality. During
normal operation, the switching frequency can reach 0.85 fsw(high). This requirement
must be met for the highest specified LED voltage.
On the other hand, the converter must be capable to handle the lowest specified LED
voltage. The auxiliary winding of the transformer generates the IC’s VCC supply voltage.
As the minimum and maximum requirements for the supply voltage of the IC have a given
ratio, the ratio of the lowest and highest LED voltage is also determined.
Choose the auxiliary voltage carefully if a large LED voltage ratio is required. An LED
voltage ratio up to three can be realized with this IC.
The open output protection limits the output voltage to Umax / 0.85 when the circuit is
designed according to the guidelines contained in this data sheet.
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
6 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
9. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
General
Tamb
Parameter
Conditions
Min
Max
Unit
ambient temperature
junction temperature
storage temperature
40
40
55
+85
C
C
C
Tj
+150
+150
Tstg
Voltages
VCC
supply voltage
continuous [1]
current limited
0.3
2
+35
+700
+5
V
V
V
VDRAIN
VSENSE
Currents
IM(DRAIN)
voltage on pin DRAIN
voltage on pin SENSE
20
peak current on pin DRAIN
current on pin DRAIN
SSL21151
0.7
1.5
0.1
0.1
0.7
1.5
2
+0.7
+1.5
+0.7
+1.5
+0.1
+0.1
+2
A
A
A
A
A
SSL21153
IDRAIN
ISOURCE
VESD
SSL21151
SSL21153
current on pin SOURCE
electrostatic discharge voltage
SSL21151
SSL21153
[1]
human body model;
all pins (except DRAIN)
pin DRAIN
kV
1
+1
kV
V
charged device model
500
+500
[1] Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor.
10. Thermal characteristics
Table 5.
Symbol
Rth(j-a)
Thermal characteristics
Parameter
Conditions
Typ
Unit
thermal resistance from junction in free air; SO7 package, PCB: 475 mm,
136
K/W
to ambient
2-layer, 70 m Cu per layer
in free air; SO7 package, PCB:
136
K/W
1750 mm, 1-layer, 35 m Cu per layer
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
7 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
11. Characteristics
Table 6.
amb = 25C, VCC = 20 V; VSENSE = 0 V; RSOURCE = 1.5 ; all voltages referenced to GND, positive currents flow into the IC,
unless otherwise specified.
Characteristics
T
Symbol
Supply
ICC
Parameter
Conditions
Min
Typ
Max Unit
supply current
operating
0.53
15
0.75
17
0.97 mA
VCC(startup)
VCC(UVLO)
start-up supply voltage
19
V
V
undervoltage lockout supply
voltage
7.5
8.5
9.5
Istartup(DRAIN)
VBR(DRAIN)
Output stage
RDSon
start-up current on pin DRAIN
0.2
0.7
-
1.6
-
mA
V
breakdown voltage on pin DRAIN
700
drain-source on-state resistance SSL21151; Tj = 25 C
SSL21153; Tj = 25 C
13
3.5
-
15.5
4.8
1
17
6
IDRAIN(off)
off-state drain current
VDRAIN = 325 V
-
A
Temperature protection
Tth(otp)
overtemperature protection
threshold temperature
junction temperature
junction temperature
140
-
150
50
160
C
C
Totp(hys)
overtemperature protection trip
hysteresis
Peak current comparator (SOURCE pin)
td(ocp)
overcurrent protection delay time dV/dt = 0.2 V/s
-
100
325
-
ns
ns
tleb
leading edge blanking time
290
360
Vref(high)pk
high peak reference voltage
maximum peak voltage
0.525 0.555 0.585 V
without jitter
Vref(low)pk
Vref-0V
low peak reference voltage
in LED open output mode
in CC mode with VFBS = 0 V
0.085 0.1
0.115
0.24
V
V
reference voltage at start-up or
0 V feedback voltage
0.18
3.1
0.21
Sense input (SENSE pin)
Vth(ovp)sence
sense overvoltage protection
3.2
3.3
V
threshold voltage
Vref(sense)
sense reference voltage
LED overvoltage mode
2.5
25
-
2.6
75
V
Vth(det)demag(sense)
demagnetization detection voltage
level on Sense pin
50
mV
Frequency switching
fjit/fsw
jitter frequency to switching
frequency ratio
in all operation modes
except in burst mode
5
7
9
%
fsw(high)
fsw(low)
max
high switching frequency
low switching frequency
maximum duty cycle
maximum switching, without
jitter
48
21
72
50.5
22.5
75
53
24
78
kHz
kHz
%
minimum switching, without
jitter.
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
8 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
12. Application information
The application is shown in Figure 4. More information can be found in the application
note for the SSL2115X
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Fig 4. A typical SSL2115X application
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
9 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
13. Package outline
SO7: plastic small outline package; 7 leads; body width 3.9 mm
SOT1175-1
D
E
A
X
c
H
E
v
A
y
Z
7
5
Q
A
2
A
A
1
A
3
θ
pin 1 index
L
p
L
1
4
detail X
e
w
b
p
0
2.5
5 mm
scale
Dimensions
Unit
A
A
A
A
b
p
c
D
E
e
H
E
L
L
p
Q
v
w
y
Z
θ
1
2
3
°
°
°
6.2
6.0
5.8
1.0 0.70
0.7 0.67
0.4 0.60
0.7
0.5
0.3
8
4
0
max 1.75 0.250 1.45
mm nom
min
0.49 0.25 5.0 4.0
0.175 1.35 0.25 0.40 0.20 4.9 3.9 1.27
0.100 1.25 0.36 0.19 4.8 3.8
1.05
0.25 0.25 0.1
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
sot1175-1_po
References
Outline
version
European
projection
Issue date
IEC
- - -
JEDEC
- - -
JEITA
- - -
10-03-30
10-04-21
SOT1175-1
Fig 5. Package outline SOT1175-1 (SO7)
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
10 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
14. Abbreviations
Table 7.
Abbreviations
Description
Acronym
BCM
Boundary Conduction Mode
Bill Of Materials
BOM
JFET
LEB
Junction Field-Effect Transistor
Leading-Edge Blanking
Light Emitting Diode
LED
MOSFET
OCP
Metal-Oxide Semiconductor Field-Effect Transistor
OverCurrent Protection
OSP
Output Short Protection
OTP
OverTemperature Protection
Printed-Circuit Board
PCB
PWM
SMPS
UVLO
ZCS
Pulse-Width Modulation
Switched Mode Power Supply
UnderVoltage LockOut
Zero-Current Switching
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
11 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
15. Revision history
Table 8.
Revision history
Document ID
SSL2115X v.2
Modifications
Release date
Data sheet status
Change notice
Supersedes
20120607
Product data sheet
-
SSL2115X v.1
• Data sheet title changed
• Minor text changes to Section 1 “General description” on page 1.
• Minor text changes to Section 2 “Features and benefits” on page 1.
• Minor text changes to Section 4 “Quick reference data” on page 2.
SSL2115X v.1
20120529
Objective data sheet
-
-
SSL2115X
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
12 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
16. Legal information
16.1 Data sheet status
Document status[1][2]
Product status[3]
Development
Definition
Objective [short] data sheet
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Preliminary [short] data sheet Qualification
Product [short] data sheet Production
[1]
[2]
[3]
Please consult the most recently issued document before initiating or completing a design.
The term ‘short data sheet’ is explained in section “Definitions”.
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.
Suitability for use — NXP Semiconductors products are not designed,
16.2 Definitions
authorized or warranted to be suitable for use in life support, life-critical or
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malfunction of an NXP Semiconductors product can reasonably be expected
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with the same product type number(s) and title. A short data sheet is intended
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full information. For detailed and full information see the relevant full data
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Limited warranty and liability — Information in this document is believed to
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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.
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SSL2115X
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
13 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
Export control — This document as well as the item(s) described herein
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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
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standard warranty and NXP Semiconductors’ product specifications.
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.
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
16.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
non-automotive qualified products in automotive equipment or applications.
GreenChip — is a trademark of NXP B.V.
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
17. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
SSL2115X
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 7 June 2012
14 of 15
SSL2115X
NXP Semiconductors
Low-cost non-dimmable LED driver IC
18. Contents
1
2
3
4
5
6
General description. . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Quick reference data . . . . . . . . . . . . . . . . . . . . . 2
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7
7.1
7.2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 3
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
8
Functional description . . . . . . . . . . . . . . . . . . . 4
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Current source operation . . . . . . . . . . . . . . . . . 4
Leading-Edge Blanking (LEB) . . . . . . . . . . . . . 5
dV/dt detection . . . . . . . . . . . . . . . . . . . . . . . . . 5
Turn-off-time (toff) . . . . . . . . . . . . . . . . . . . . . . . 5
Supply concepts VCC and UnderVoltage
8.1
8.2
8.3
8.4
8.5
8.6
LockOut (UVLO). . . . . . . . . . . . . . . . . . . . . . . . 5
Peak current detection . . . . . . . . . . . . . . . . . . . 5
LED OverTemperature Protection (OTP) . . . . . 5
LED Output Short-circuit Protection (OSP). . . . 5
Output LED open-circuit protection . . . . . . . . . 5
Operational limits . . . . . . . . . . . . . . . . . . . . . . . 6
8.7
8.8
8.9
8.10
8.11
9
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal characteristics . . . . . . . . . . . . . . . . . . 7
Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 8
Application information. . . . . . . . . . . . . . . . . . . 9
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 10
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 11
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 12
10
11
12
13
14
15
16
Legal information. . . . . . . . . . . . . . . . . . . . . . . 13
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 13
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
16.1
16.2
16.3
16.4
17
18
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. 2012.
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: 7 June 2012
Document identifier: SSL2115X
相关型号：
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