GP-LD3548-0B
350mA High Efficiency Step-UP LED Driver
Features
RoHS-compliant 2"x1" case Package Power LED Driver
Constant Current Output (±5% Output Current Accuracy)
LED Driver Rated Current 350mA
Soft Start
Wide Input Voltage Range:9V to 36V (38V for 0.1sec.)
Output Power to 16.8W
Driver LED Strings of up to 48V (14V to 48V)
High Efficiency (up to 94%)
PWM/Digital Dimming and Analog Voltage Dimming
Open Voltage Protection / Short LED Protection
-40°C ~ 85°C Operation Temperature Range
B
3548-0
GP-LD
Application
12V and 24V Solar Lighting Systems
Household/Commercial Lighting
Suitable for High illumination LED
Power Limited (battery) Lighting System
GP-LD3548-0B is a high efficiency step-up converter optimized to drive high current LEDs. The control algorithm allows highly ef ficient
and accurate LED current regulation. The device operates from an input 9Vdc to 36Vdc and provides an externally adjustable output
current of up to 350mA and output power up to 16.8 watts. Compact size of 2"x1" case allows designer to integrate this driver together with
LED module. UL-94V0 grade molded case with high grade filling material provide excellent fire proof characteristics.
(Typical at Ta = +25°C, nominal input voltage, rated output current unless otherwise specified.)
ON/OFF Control (Leave Open if Not Used) : (EN)
Electrical Specifications
Input Voltage (Vdc)
9V ~ 36V (38V for 0.1 sec.) DC/DC ON ......................................................................... Open
Input Filter
Capacitor DC/DC OFF (Shutdown) ............................................................. 0V
Output Voltage Range (Vo - Vin 5V) (1)
14V to 48V Remote Pin Drive Current (V EN 3V) .................................... <1.5uA
Output Current Range (Vo - Vin 5V)
350mA Quiescent Input Current in Shutdown Mode (Vin 9V~32V) .... 1.3mA Max.
(Vin 32V~36V) ...... 8mA Max.
±5 %
Output Current Accuracy
Output Power ( 2 )
16.8W Max.
Ripple and Noise, ( 20 MHz bandwidth )
600mVp-p Max.
Efficiency
89.5% ~ 94% , 89.5% Min. Analog and PWM Dimming Control (Leave Open if Not Used) : (DIM)
Capacitive Load (3)
100 uF Max. Absolute Maximum Ratings ..................................................... 8V
Operating Frequency
380 K Hz typ. Analog Dimming Control
DIM Input Voltage Range ....................................... 0.4V to 1.7V
Over Voltage Protection (OVP)
52.5V Max.
Adjust Output Current ............................................ 0% to 100%
Short Circuit Protection (4)
Automatic Recovery (Cut-off output)
DIM Pin Drive Current (0.3V V DIM 1.3V ) ...................................... <1.5uA
Under Voltage Protection (Cool Start) (5)
7.6V typ.
Soft Start Time (Not to increase additional output capacitor)
50mS Max. PWM Dimming Control (6)
PWM Control Voltage Range Limits ........... (1.7V V DIM 5.0V )
Temperature Coefficient (Ta = -40°C to +85°C )
±0.03%/°C Max.
Recommended Operation Frequency ............... 100Hz~100KHz
+15.9°C/W
Thermal Impedance (Nature Convection)
Adjust Output Current ............................................ 0% to 100%
Safety Standard : (designed to meet) IEC/EN 60950-1 UL8750 and IEC/EN61347-2-13
Environmental Specifications
Operating Temperature Range, Ta (Vin 9V~18V)
(Vin 18V~36V)
Storage Temperature Range
Humidity
Maximum Case Tempeature
Cooling
Reliability Calculated MTBF(MIL-HDBK-217 F)
(Vin=9V Vout=48V , +25 °C)
Soldering Temperature ( 1.5mm from case 10 sec . )
EMC Specifications
-40 °C to +75°C
-40 ° C to +85° C
-55°C to +125°C
95% rel H
+110°C
Nature Convection
>1.1Mhrs
Physical Specifications
Case Material
Non-conductive Black Plastic(UL94V-0 rated)
Potting Material
Epoxy (UL94V-0 rated)
Silicon (UL94V-0 rated )
Pin Material
¨ 1.0mm Brass Solder-coated
Weight
38g
Dimensions
51.5(L)"x26.1(W)"x15.8(H)"mm
+260 °C
(designed to meet)
EMI Radiated & Conducted Emissions
EN 55022 Class B
NOTE
1.To prevent the burned out of driver, The output voltage must be 5.0Vdc higher than input voltage.
2.DO NOT operate the driver over 16.8W output.
3.The Output ripple has been rather low, it's recommended not to increase the additional output capacitor, otherwise there will be time
delay while starting up under cool starting.
4.There is protection while output is shorted, after the short occurs , input current will be cut off and recover while short is removed.
5.The reference value of under voltage protection -- 7.6V means under the condition of cool start and full
discharge of output , protection starts when input voltage is lower under 7.6V.
6.Please note , PWM dimming means PWM signals is converted into mimic analog voltage by internal
circuits and then do the dimming. The advantage of such approach is to reduce the EMI.
1
GP-LD3548-0B
350mA High Efficiency Step-UP LED Driver
Der at i n g Cu r v e
100%
OUTPUT POWER
(Vin 9V~18V)
(Vin 18V~36V)
75%
S.O.A.
50%
25%
-40
Mecha nical
-20
0
20
40
60 75 80 85 100
AMBIENT TEMPERATURE(° )
120
Dime nsion
51.50
(2.03)
45.72
(1.80)
PIN CONNECTIONS
15.80
(0.62)
1.00
(0.04)
5
1
PIN #
20.32
(0.80)
26.10
(1.03)
6.77
(0.27)
2
6.77
(0.27)
Top View
6.77
(0.27)
6
51.50
(2.03)
15.80
(0.62)
5.08
(0.20)
(Min)
45.72
(1.80)
+Vi
+DC Supply
2
DIM
PWM/ Analog
Dimming Control
3
EN
Remote ON/OFF
4
-Vi
5
+ LED
LED Anode Connection
6
- LED
LED Cathode Connection
1
20.32
(0.80)
3
4
CONNECTIONS
-DC Supply (GND)
All dimensions are typical in millimeters ( inches )
1. Pin diameter: 1.0 ±0.05 ( 0.04 ±0.002 )
2. Pin pitch tolerance: ±0.35 ( ±0.014 )
3. Case Tolerance: ±0.5 ( ±0.02 )
Typical Operating Conditions
ILED (mA)
Vin & Vout Vs Output Curr ent
( Electronic Load CV Mode 14V ~ 48V )
Efficiency (%)
Vin & Vout Vs Efficiency
( Electronic Load CV Mode 14V ~ 48V )
95.0
352.0
351.5
94.5
351.0
350.5
4LED
94.0
4LED
5LED
93.5
5LED
6LED
93.0
6LED
7LED
92.5
7LED
350.0
349.5
349.0
8LED
348.5
8LED
92.0
348.0
9LED
347.5
10LED
9LED
347.0
11LED
346.5
12LED
346.0
13LED
90.0
13LED
345.5
14LED
89.5
14LED
91.5
10LED
91.0
11LED
90.5
345.0
12LED
89.0
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Vin (V)
Vin (V)
2
GP-LD3548-0B
350mA High Efficiency Step-UP LED Driver
Vin= 9V Vout=48V
Vin & Vout Vs Output Current Accuracy
( Electronic Load CV Mode 14V ~ 48V )
Output Curre nt
Accuracy
Vin=12V Vout=48V
Output Current Vs DIM
ILED (mA)
Vin=24V Vout=48V
Vin=36V Vout=48V
0.50%
360.0
345.0
330.0
315.0
0.25%
4LED
300.0
285.0
270.0
5LED
0.00%
6LED
-0.25%
255.0
240.0
7LED
225.0
210.0
8LED
-0.50%
195.0
180.0
165.0
9LED
10LED
-0.75%
150.0
135.0
120.0
105.0
11LED
-1.00%
12LED
90.0
75.0
60.0
45.0
30.0
13LED
-1.25%
14LED
-1.50%
15.0
0.0
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Vin (V)
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
DIM (V)
EMC Characteristics meet EN55022
EN55022 Class B Filter Suggestion:
L1
+Vin
TVS
C1
+
-Vin
C1 ----> 47uF/100V
C2 ----> 330uF/100V
C3 ----> 330uF/100V
TVS --> 38V
C2
+
+LED
+Vi
NF
1
C3
+
4
-Vi
GP-LD3548-0B
2
5
1st LED
6
3
Last LED
EN
L2
DIM
(
PWM/ Analog
Dimming Control
L1 --> 13.3uH/4A
L2 --> 13.3uH/4A
NF--> 3.0mH/4A(Command choke)
)
- LED
Conduction Test Data
Vin=12V Vout=48V( LED Load Vf=3.5V
POLARITY:NEUTRAL
14LED
48V )
Vin=12V Vout=48V( LED Load Vf=3.5V
POLARITY:LINE
3
14LED
48V )
GP-LD3548-0B
350mA High Efficiency Step-UP LED Driver
Vin=36V Vout=48V( LED Load Vf=3.5V
POLARITY:NEUTRAL
14LED
48V )
Vin=36V Vout=48V( LED Load Vf=3.5V
POLARITY:LINE
14LED
48V )
Vin=12V Vout=48V( LED Load Vf=3.5V
POLARITY:HORIZONTAL
14LED
48V )
Vin=24V Vout=48V( LED Load Vf=3.5V
POLARITY:HORIZONTAL
14LED
48V )
Vin=36V Vout=48V( LED Load Vf=3.5V
POLARITY:HORIZONTAL
14LED
48V )
Conduction Test Data
4
GP-LD3548-0B
350mA High Efficiency Step-UP LED Driver
Typical Application
AC IN
6.5V AC
-
~
+LED
+Vi
0.1uF
optional
1
+
+
GP-LD3548-0B
4
-
25 VAC
5
-Vi
2
3
Last LED
EN
AC IN
DIM
(
100uF ~ 330uF
+Vin
- Vin
+LED
+Vi
1
5
GP-LD3548-0B
4
-Vi
2
PWM/ Analog
Dimming Control
+Vin
1st LED
6
- Vin
3
DIM
PWM/ Analog
Dimming Control
+LED
1
4
-Vi
5
GP-LD3548-0B
6
1st LED
2
3
Last LED
EN
DIM
- LED
)
- LED
)
+Vi
Last LED
EN
(
1st LED
6
(
PWM/ Analog
Dimming Control
- LED
)
Under VoltageProtection
+Vin
- Vin
+LED
+Vi
1
GP-LD3548-0B
4
5
+Vin
1st LED
6
- Vin
EN
-Vi
2
3
SW
ON
OFF
DIM
SW
Vout
ON
OFF
0V
normal
1
4
-Vi
5
GP-LD3548-0B
1st LED
6
EN
2
3
Last LED
Last LED
R1
DIM
- LED
R1
+LED
+Vi
- LED
Under Voltage
Protection
X
12K
10K
7.5K
4.7K
3.3K
2.7K
2.4K
2.0K
1.8K
7.6V
10.8V
11.6V
13.0V
16.5V
21.0V
24.1V
26.2V
29.8V
32.4V
The R1 Value Only Supplies The Reference
Output Current Adjustment Control By External DC Control Voltage
DIM : +5V
+LED
+Vi
1
2
0.4V~1.7V
GP-LD3548-0B
6
DIM
-Vi
DC
5
4
R1
380K
1st LED
1
VR
200K
3
+LED
+Vi
2
0V~1.7V
GP-LD3548-0B
-Vi
1st LED
6
DIM
3
4
Last LED
EN
5
Last LED
EN
GND
- LED
- LED
When the value of Vin is 9~36 Vin , it can
use the method which is shown below.
+Vin
DIM : 0V~10V
R1
1M
1
2
R2
210K
+LED
+Vi
0V~1.7V
GP-LD3548-0B
6
DIM
-Vi
5
4
1st LED
Vin
R1
5V
12V
24V
36V
4.7K
18K
43K
62K
R2
380K
+LED
+Vi
VR
200K
TL431
3
EN
R1
1
2
GP-LD3548-0B
6
DIM
-Vi
Last LED
4
GND
A-1
1st LED
3
EN
- LED
5
Last LED
- LED
GP-LD3548-0B
350mA High Efficiency Step-UP LED Driver
Typical Application
Output Current Adjustment Control By PWM Control
Driving the DIM input via open collector transistor
Directly driving DIM input
A Pulse Width Modulated (PWM) signal
can be applied to the DIM pin, as shown below
+5V
+Vi
+Vin
5V
PWM
+LED
1
4
- Vin
GP-LD3548-0B
-Vi
2
1st LED
6
1
4
210
Last LED
EN
GP-LD3548-0B
-Vi
2
5
1st LED
6
3
DIM
2SD1782K
GND
+LED
+Vi
12K
PWM
3
DIM
0V
5
Last LED
EN
- LED
- LED
Driving the DIM input from a microcontroller
Another possibility is to drive the device from the open drain output
of a microcontroller. The diagram below shows one method of doing this:
+5V
MCU
12K
+LED
+Vi
1
4
-Vi
2
1st LED
6
3
DIM
2SK3018
5
GP-LD3548-0B
Last LED
EN
GND
- LED
Output Current Adjustment By PWM Control (Dimming)
To avoid visible flicker the PWM signal must be greater than 100Hz.
+Vin
+Vout
DC / DC
Converter
- Vin
+5Vdc
10uF
16V
+
470
-
-Vout
8
4
Vcc
Reset
7
Discharge
104
12K
2SD1782K
1N4148
6
Threshold
Out
3
+LED
+Vi
1
4
-Vi
GP-LD3548-0B
2
5
1st LED
6
3
210
2
VR
100K
104
Trigger
NE 555
Crt_V
DIM
5
GND
1
Last LED
EN
104
- LED
Output Current Adjustment By PWM Control (Flash)
+Vin
+Vout
DC / DC
Converter
- Vin
+5Vdc
10uF
16V
+
-
VR
100K
8
4
Vcc
Reset
7
Discharge
-Vout
104
12K
2SD1782K
2K
6
Threshold
Out
3
210
2
+
-
10uF
16V
Trigger
NE 555
Ctr_V
GND
1
1
GP-LD3548-0B
-Vi
5
1st LED
6
4
2
DIM
5
104
A-2
+LED
+Vi
3
Last LED
EN
- LED