SGM3727(EOL) [SGMICRO]
High Efficiency, 38V Boost White LED Driver;
| 型号： | SGM3727(EOL) |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | High Efficiency, 38V Boost White LED Driver |
| 文件： | 总10页 (文件大小：624K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM3727
High Efficiency,
38V Boost White LED Driver
GENERAL DESCRIPTION
FEATURES
The SGM3727 is a high efficiency current-regulated
white LED driver with a boost DC/DC converter. With
an internal 38V/1A power MOSFET, the SGM3727
supports up to 10 white LEDs in series and achieves
uniform brightness. 32-step LED current can be set by
a serial pulse signal into the EN/SET pin.
● Integrated 38V/1A Switch with 0.5Ω On-Resistance
● High Efficiency Boost Bias Supply
● Support up to 10 LEDs in Series per String
● 32-Step LED Brightness Control through One-Wire
Interface
● Automatic Soft-Start for Reducing Inrush Current
● No Leakage from VIN to GND through LED String
● Protection Features
The SGM3727 includes a comprehensive set of
protection features such as over-voltage protection,
cycle-by-cycle current limit and thermal shutdown.
Built-in soft-start circuitry avoids excessive inrush
current during startup.
Programmable Over-Voltage Protection
Cycle-by-Cycle Current Limit
Thermal Shutdown
● -40℃ to +85℃ Operating Temperature Range
● Available in a Green TDFN-2×2-8L Package
The SGM3727 is available in a Green TDFN-2×2-8L
package. It operates over an ambient temperature
range of -40°C to +85°C.
APPLICATIONS
Smart Phones and Portable Media Players
TFT LCD Displays
GPS/PND
TYPICAL APPLICATION
L1
Up to
D1
10 WLEDs
8
2
VIN
VDD
SW
VOUT
2.8V to 5.0V
CIN
RVO2
COUT
7
SGM3727 OVP
RVO1
Enable and
Dimming Control
3
6
5
EN/SET
FB
RSET
GND
RS
1
Figure 1. Typical Application
SG Micro Corp
www.sg-micro.com
NOVEMBER2013–REV. A. 1
High Efficiency,
SGM3727
38V Boost White LED Driver
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
3727
XXXX
SGM3727
TDFN-2×2-8L
SGM3727YDE8G/TR
Tape and Reel, 3000
-40℃ to +85℃
MARKING INFORMATION
NOTE: XXXX = Date Code.
X X X X
Date Code - Week
Date Code - Year
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
OVERSTRESS CAUTION
ABSOLUTE MAXIMUM RATINGS
SW, FB to GND.................................................. -0.3V to 40V
VDD, EN/SET to GND ......................................... -0.3V to 6V
RSET, OVP to GND ............................................. -0.3V to 6V
Continuous SW Current...................... Internally limited to 1A
Package Thermal Resistance
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
TDFN-2×2-8L, θJA...................................................... 75℃/W
Junction Temperature.................................................+150℃
Storage Temperature Range.......................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
ESD SENSITIVITY CAUTION
This integrated circuit can be damaged if ESD protections are
not considered carefully. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failureto observe proper handlingand installation procedures
can cause damage. ESD damage can range from subtle
performance degradation tocomplete device failure. Precision
integrated circuits may be more susceptible to damage
because even small parametric changes could cause the
device not to meet the published specifications.
HBM.............................................................................4000V
MM.................................................................................200V
RECOMMENDED OPERATING CONDITIONS
Operating Temperature Range .......................-40℃ to +85℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
NOVEMBER 2013
2
High Efficiency,
SGM3727
38V Boost White LED Driver
PIN CONFIGURATION
(TOP VIEW)
GND
VDD
1
2
3
4
8
SW
7
6
5
OVP
FB
EN/SET
NC
RSET
TDFN-2×2-8L
PIN DESCRIPTION
PIN
1
NAME
GND
VDD
EN/SET
NC
FUNCTION
Ground Pin.
Input Supply Pin.
2
Enable Control and One-Wire Dimming Interface. Pull it high to enable the device. Apply a serial pulse
signal to this pin for dimming control. This pin remains low for 3ms to shut down the device.
3
4
No Connection.
Current Setting Pin. Connect an external resistor from this pin to ground to set the maximum LED
current.
5
RSET
FB
6
Feedback Input for Current. Connect to the cathode of the white LED.
Over-Voltage Protection Input. Connect to an external resistor divider. Once VVOP exceeds 1.24V, the
device is automatically shut down.
7
OVP
SW
8
Boost Switching Node. Connect an inductor between the VDD and SW pins.
Exposed Pad. It should be soldered to PCB board and connected to GND.
Exposed
Pad
GND
SG Micro Corp
www.sg-micro.com
NOVEMBER 2013
3
High Efficiency,
SGM3727
38V Boost White LED Driver
ELECTRICAL CHARACTERISTICS
(VIN = 3.3V, VEN = 2.8V, TA = 25℃, unless otherwise specified.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.0
UNITS
V
Input Voltage
VIN
2.8
Power Switch Voltage Rating
38
V
Under-Voltage Lockout Threshold
Under-Voltage Lockout Hysteresis
VUVLO
VIN Rising
2.1
2.2
70
2.45
V
mV
mA
mA
µA
µs
ns
Not Switching
Switching
0.045
0.12
0.2
0.08
0.16
1
Supply Current
Supply Current in Shutdown
Maximum On Time
ISHDN
tON
EN/SET = GND
VIN = 3.5V
5
6.2
7.5
550
330
1250
1
Minimum Off Time
tOFF
300
300
750
420
314
1000
0.5
RSET Voltage
VRSET
ILIM
mV
mA
Ω
Switch Current Limit
Switch On-Resistance
LED Switch On-Resistance
Switch Leakage Current
Over-Voltage Protection Threshold
OVP Input Current
RDS(ON)
VIN = 3.3V
VIN = 3.3V (from FB to RSET)
VSW = 38V, EN/SET = GND
VOVP Rising
2.2
Ω
0.1
µA
V
1.1
1.24
1
1.31
300
1
VOVP = 1.5V
nA
µA
℃
EN/SET Input Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
EN/SET Logic
VEN = 0V or 2.8V
0.1
155
25
℃
EN Low Time for Shutdown
EN Low Time for Dimming
EN High Time for Dimming
tSHDN
tIL
3
ms
μs
μs
V
0.5
0.5
1.5
500
0.5
tIH
Logic-High Voltage
EN Threshold
VIH
VIL
Logic-Low Voltage
V
SG Micro Corp
www.sg-micro.com
NOVEMBER 2013
4
High Efficiency,
SGM3727
38V Boost White LED Driver
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs. Input Voltage
Efficiency vs. LED Current
90
85
80
75
70
65
60
100
90
80
70
60
50
COUT = 10μF, L = 10μH
ILED = 30mA
VIN = 5.0V
ILED = 10mA
ILED = 20mA
VIN = 3.3V
VIN = 2.8V
10 LEDs Connected
10 LEDs Connected
2.5
3
3.5
4
4.5
5
0
5
10
15
20
25
30
35
LED Current (mA)
Input Voltage (V)
Main Sw itch RDS(ON) vs. Input Voltage
Quiescent Current vs. Input Voltage
700
600
500
400
300
200
0.07
0.06
0.05
0.04
0.03
0.02
+85℃
+25℃
-40℃
2.5
3
3.5
4
4.5
5
2.5
3
3.5
4
4.5
5
Input Voltage (V)
Input Voltage (V)
RSET Voltage vs. Temperature
329
324
319
314
309
304
-50
-25
0
25
50
75
100
Temperature (℃)
SG Micro Corp
www.sg-micro.com
NOVEMBER 2013
5
High Efficiency,
SGM3727
38V Boost White LED Driver
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
SG Micro Corp
www.sg-micro.com
NOVEMBER 2013
6
High Efficiency,
SGM3727
38V Boost White LED Driver
TYPICAL APPLICATION
L1
D1
4 Serial WLEDs
2
8
7
VIN
VDD
SW
VOUT
2.8V to 5.0V
CIN
RVO2
COUT
SGM3727 OVP
RVO1
Enable and
Dimming Control
3
6
5
EN/SET
FB
1 to 3 String Parallel WLEDs
RSET
GND
RS
1
Figure 2. Application for Driving 3 × 4 WLEDs
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
NOVEMBER 2013 ‒ REV.A to REV.A.1
Page
Changed Absolute Maximum Ratings section......................................................................................................................................................2
Changes from Original (AUGUST 2012) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
NOVEMBER 2013
7
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TDFN-2×2-8L
D
e
N8
E1
D1
L
E
k
N4
N1
b
BOTTOM VIEW
TOP VIEW
1.20
0.65
0.60 1.95
A
A1
A2
SIDE VIEW
0.24
0.50
RECOMMENDED LAND PATTERN (Unit: mm)
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
0.800
0.050
MIN
0.028
0.000
MAX
0.031
0.002
A
A1
A2
D
0.700
0.000
0.203 REF
0.008 REF
1.900
1.100
1.900
0.500
2.100
1.300
2.100
0.700
0.075
0.043
0.075
0.020
0.083
0.051
0.083
0.028
D1
E
E1
k
0.200 MIN
0.500 TYP
0.008 MIN
0.020 TYP
b
0.180
0.250
0.300
0.450
0.007
0.010
0.012
0.018
e
L
SG Micro Corp
www.sg-micro.com
TX00056.000
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant
TDFN-2×2-8L
7″
9.5
2.30
2.30
1.10
4.0
4.0
2.0
8.0
Q1
SG Micro Corp
TX10000.000
www.sg-micro.com
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Reel Type
Pizza/Carton
7″ (Option)
7″
368
442
227
410
224
224
8
18
SG Micro Corp
www.sg-micro.com
TX20000.000
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