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PDF MBI6651 Data sheet ( Hoja de datos )
| Número de pieza | MBI6651 | |
| Descripción | Step Down / 1A LED Driver | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MBI6651 (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
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Macroblock
Datasheet
MBI6651
Step-Down, 1A LED Driver
Features
z 1A constant output current
z 96% efficiency @ input voltage 12V, 350mA, 3-LED
z 9~36V input voltage range
z Hysteretic PFM improves efficiency at light loading
Surface Mount Device
z Settable output current
z Integrated power switch with 0.45ohm low Rds(on)
z Full protection: Thermal/UVLO/Start-Up/LED Open-/Short- Circuit
z Only 4 external components required
GPSSDD: TO-252-5L
Product Description
Small Outline Transistor
The MBI6651 is a high efficiency, constant current and step-down DC/DC
converter. It is designed to deliver constant current to light up high power LED
with only 4 external components. With hysteretic PFM control scheme,
MBI6651 improves the efficiency of light loading. The output current of
MBI6651 can be programmed by an external resistor and LED dimming can
be controlled via pulse width modulation (PWM) through DIM pin. In addition,
the start-up function limits the inrush current while the power is switch on. The
MBI6651 also features under voltage lock out (UVLO), over temperature
protection, LED open-circuit protection and LED short-circuit protection to
protect IC from being damaged.
Additionally, to ensure the system reliability, the MBI6651 builds thermal
protection (TP) function inside. This function protects IC from overheating
(165°C) in various application conditions. MBI6651 provides thermal-
enhanced packages as well to handle power dissipation more efficiently.
MBI6651 is available in TO-252, SOT-23 and MSOP-8 packages.
GST: SOT-23-6L
Mini Small Outline Package
GMS: MSOP-8L-118mil
Applications
z Signage and Decorative LED Lighting
z Automotive LED Lighting
z High Power LED Lighting
z Constant Current Source
©Macroblock, Inc. 2011
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 - July 2011, VA.00
1 page  
MBI6651
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
SW Dropout Voltage
Internal Propagation Delay
Time
Efficiency
Input Voltage
“H” level
“L” level
Switch ON Resistance
Minimum Switch ON Time*
Minimum Switch OFF
Time*
Recommended Duty Cycle
Range of SW*
Maximum Operating
frequency
CURRENT SENSE
Symbol
VIN
IIN
IOUT
dIOUT/IOUT
VSW
Tpd
-
VIH
VIL
Rds(on)
TON,min
TOFF,min
Dsw
FreqMax
Mean SEN Voltage
VSEN
THERMAL OVERLOAD
Thermal Shutdown
Threshold*
TSD
Thermal Shutdown
Hysteresis*
TSD-HYS
UNDER VOLTAGE LOCK OUT
UVLO Voltage
-
UVLO Hysteresis
-
Start Up Voltage
-
DIMMING
Duty Cycle Range of PWM
Signal Applied to DIM pin
DutyDIM
*Guaranteed by Design.
Condition
-
VIN=9V~36V
-
350mA≤IOUT≤1000mA,
IOUT=1A
VIN=12V, IOUT=350mA, VOUT=10.8V
-
-
VIN=12V; refer to test circuit (b)
VIN=10V, V1=1V, refer to test circuit
(c)
-
-
TA=-40~85°C
-
-
PWM frequency: 100Hz ~ 1kHz
Min.
9
-
-
-
-
100
-
3.5
-
0.4
100
100
20
40
95
145
20
7.7
0.15
7.85
1
Typ.
-
1
350
±3
0.45
196
96
-
-
0.45
350
350
-
-
100
165
30
8
0.2
8.2
-
Max.
36
2
1000
±5
-
300
-
-
0.5
0.6
450
450
80
1000
Unit
V
mA
mA
%
V
ns
%
V
V
Ω
ns
ns
%
kHz
105 mV
175 °C
40 °C
8.3
0.35
8.65
V
V
V
100 %
- 5 - July 2011, VA.00
5 Page 
MBI6651
Step-Down, 1A LED Driver
5. Output Current vs. LED Cascaded Number at Various Input Voltage
Output current vs. LED cascaded number @ L1=22uH
1030
1020
1010
1000
990
24VIN
36VIN
RSEN=0.1Ω
L1=22uH
CIN=COUT=10uF
980
970
960
9VIN
12VIN
950
940
930
1
2 3 45 6
LED Cascaded Number
Fig 40. IOUT=1A
7
820
800
780 36VIN
24VIN
760
RSEN=0.135Ω
L1=22uH
CIN=COUT=10uF
740
12VIN
720
9VIN
700
680
1
2 3 45
LED Cascaded Number
Fig 41. IOUT=740mA
6
7
460
RSEN=0.27Ω
440 L1=22uH
420 CIN=COUT=10uF
400
380
360
340
320
300
1
9VIN 12VIN
2 3 45
LED Cascaded Number
Fig 42. IOUT=370mA
36VIN
24VIN
67
Output current vs. LED cascaded number @ L1=68uH
1000
995
36VIN
990
RSEN=0.1Ω
L1=68uH
CIN=COUT=10uF
985 24VIN
980
975 9VIN
970
965 12VIN
960
1
23 45
LED Cascaded Number
Fig 43. IOUT=1A
6
7
745
740 36VIN
735
730
725 24VIN
RSEN=0.135Ω
L1=68uH
CIN=COUT=10uF
720
715
710
705
700 9VIN
12VIN
695
690
1
23 45 6
LED Cascaded Number
Fig 44. IOUT=740mA
7
390
RSEN=0.27Ω
380 L1=68uH
CIN=COUT=10uF
370
360
350
340
330
1
9VIN 12VIN
2345
LED Cascaded Number
Fig 45. IOUT=370mA
36VIN
24VIN
67
Output current vs. LED cascaded number @ L1=100uH
980
RSEN=0.1Ω
975
12VIN
L1=100uH
CIN=COUT=10uF
970
965
960 9VIN
955
36VIN
24VIN
950
1
23 4 5
LED Cascaded Number
Fig 46. IOUT=1A
6
7
745
RSEN=0.135Ω
L1=100uH
740 CIN=COUT=10uF
735
730
12VIN
725 9VIN
720
1
23 45
LED Cascaded Number
Fig 47. IOUT=740mA
36VIN
24VIN
67
390
RSEN=0.27Ω
385 L1=100uH
380 CIN=COUT=10uF
375
370
365
360
9VIN
12VIN
355
36VIN
24VIN
350
1 23 4 5
LED Cascaded Number
Fig 48. IOUT=370mA
6
7
- 11 -
July 2011, VA.00
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet MBI6651.PDF ] | |
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