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PDF MBI6655 Data sheet ( Hoja de datos )
| Número de pieza | MBI6655 | |
| Descripción | 1A LED Driver | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Macroblock
Preliminary Datasheet
MBI6655
Step-Down, High Efficiency, 1A LED Driver
Features
Maximum 1A constant output current
97% efficiency @ input voltage 12V, 350mA, 3-LED
6~36V input voltage range
Hysteretic PFM eliminates external compensation design
Settable constant output current
Integrated power switch with 0.3ohm low Rds(on)
Full protections: Start-Up/OCP/ Thermal/ LED Open-/ Short-Circuit
Only 5 external components required
Small Outline Transistor
GSB: SOT-89-5L
Small Outline Package
Product Description
MBI6655 is a step-down constant-current high-brightness LED driver to
provide a cost-effective design solution for interior/exterior illumination
applications. It is designed to deliver constant current to light up high power
GD: SOP8L-150-1.27
LED with minimum 5 external components. With hysteretic PFM control
scheme, MBI6655 eliminates external compensation design and simplifies the PCB design.
The output current of MBI6655 can be programmed by an external resistor and dimmed via pulse width modulation
(PWM) through DIM pin. MBI6655 features complete protection design to handle faulty situations. The start-up
function limits the inrush current while the power is switched on. Over temperature protection (OTP), and over
current protection (OCP) guard the system to be robust and keep the driver away from being damaged which
results from LED open-circuited, short-circuited and other abnormal events.
MBI6655 provides thermal-enhanced SOT-89 and SOP-8 packages as well to handle power dissipation efficiently.
Applications
Signage and Decorative LED Lighting
High Power LED Lighting
Constant Current Source
Macroblock, Inc. 2014
Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC.
TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: [email protected]
- 1 - Aug 2014, V1.03
1 page  
MBI6655
Step-Down, 1A LED Driver
Electrical Characteristics
Test condition: VIN=12V, VOUT=3.6V, L1=68μH, CIN=COUT=10μF, TA=25°C; unless otherwise specified. Please refer
to test circuit (a) of Fig. 3.)
Characteristics
Supply Voltage
Supply Current
Output Current
Output Current Accuracy
Minimum SW Dropout
Voltage
Internal Propagation Delay
Time
Symbol
VIN
IIN
IOUT
dIOUT/IOUT
△VSW
Tpd
Condition
-
VIN=6V~36V
-
150mA≤IOUT≤1000mA,
IOUT=1A
VIN=12V
Min.
6
1
-
-
-
100
Typ.
-
1.3
350
±3
0.3
150
Max.
36
1.5
1000
±5
-
300
Unit
V
mA
mA
%
V
ns
Efficiency
DIM Input
“H” level
Voltage
“L” level
Switch ON Resistance
Minimum Switch ON Time*
Minimum Switch OFF
Time*
Recommended Duty Cycle
Range of SW*
Operating Frequency
Range
CURRENT SENSE
-
VIH
VIL
Rds(on)
TON,min
TOFF,min
Dsw
FreqMax
Mean SEN Voltage
VSEN
THERMAL OVERLOAD
Thermal Shutdown
Threshold*
TSD
Thermal Shutdown
Hystersis*
TSD-HYS
OVER CURRENT PROTECTION
Over Current Threshold*
Iocp
DIMMING
Duty Cycle Range of PWM
Signal Applied to DIM pin
DutyDIM
VIN=12V, IOUT=350mA, VOUT=10.8V
-
-
VIN=12V; refer to test circuit (b)
VIN=12V,
VIN=12V,
-
-
VIN=12V, V1=1V, refer to test circuit
(c)
-
-
VIN=36V
PWM Frequency: 1KHz
-
2.7
-
0.2
30
30
20
40
95
145
20
-
1
96 - %
- -V
- 0.5 V
0.3 0.4 Ω
50 100 ns
50 100 ns
- 80 %
- 1000 kHz
100 105 mV
165 175 °C
30 40 °C
1.8 2
A
- 100 %
*Parameters are not tested at production. Parameters are guaranteed by design.
- 5 - Aug 2014, V1.03
5 Page 
MBI6655
Step-Down, 1A LED Driver
5. Output Current vs. LED Cascaded Number at Various Input Voltage
Output current vs. LED cascaded number @ L1=22uH
1040
1030
1020
1010
1000
990
980
970
960
950
940
Rsen=0.1Ω
L1=22uH
Cin=Cout=10uF
9Vin
12Vin
36Vin
24Vin
12 345 67
LED Cascaded Number
730
Rsen=0.14Ω
720 L1=22uH
Cin=Cout=10uF
710
700
690 9Vin 12Vin
680
24Vin 36Vin
670
1
23456
LED Cascaded Number
7
390
380
370
360
350
9Vin
340
330
320
310
1
Rsen=0.28Ω
L1=22uH
Cin=Cout=10uF
12Vin
36Vin
24Vin
23 4 56
LED Cascaded Number
7
IOUT=1A
Fig. 40
IOUT=700mA
Fig. 41
Output current vs. LED cascaded number @ L1=68uH
IOUT=350mA
Fig. 42
1040
1030
1020
1010
1000
990
980
970
960
950
940
12Vin
Rsen=0.1Ω
L1=68uH
Cin=Cout=10uF
9Vin
24Vin
36Vin
1 23 456 7
LED Cascaded Number
730
Rsen=0.14Ω
720 L1=68uH
Cin=Cout=10uF
710
700
690 9Vin 12Vin
680
36Vin
24Vin
670
1
23456
LED Cascaded Number
7
390
380
370
360
350
9Vin
340
330
320
310
1
12Vin
Rsen=0.28Ω
L1=68uH
Cin=Cout=10uF
36Vin
24Vin
23456
LED Cascaded Number
7
IOUT=1A
Fig. 43
IOUT=700mA
Fig. 44
Output current vs. LED cascaded number @ L1=100uH
IOUT=350mA
Fig. 45
1040
1030
1020
1010
1000
990
980
970
960
950
940
9Vin 12Vin
Rsen=0.1Ω
L1=100uH
Cin=Cout=10uF
24Vin
36Vin
12 345 67
LED Cascaded Number
730
720
710
700 9Vin 12Vin
690
Rsen=0.14Ω
L1=100uH
Cin=Cout=10uF
36Vin
24Vin
680
670
1
23456
LED Cascaded Number
7
390
Rsen=0.28Ω
380 L1=100uH
Cin=Cout=10uF
370
360
350
9Vin
340
330
12Vin
36Vin
24Vin
320
310
1
23456
LED Cascaded Number
7
IOUT=1A
Fig. 46
IOUT=700mA
Fig. 47
IOUT=350mA
Fig. 48
- 11 -
Aug 2014, V1.03
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet MBI6655.PDF ] | |
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