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PDF MBI6652 Data sheet ( Hoja de datos )
| Número de pieza | MBI6652 | |
| Descripción | Step-Down LED Driver | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MBI6652 (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
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Macroblock
Datasheet
Features
Maximum constant output current: 750mA
96% efficiency @ input voltage 12V, 350mA, 3-LED
6~30V input voltage range
Hysteretic PFM improves efficiency at light loading
Settable output current
Integrated power switch with 0.45ohm low Rds(on)
Full protection: Thermal/Start-Up/LED Open-/Short- Circuit
Only 4 external components required
Package MSL Level : 3
MBI6652
Step-Down LED Driver
Small Outline Transistor
GST: SOT-23-6L
Mini Small Outline Package
GMS: MSOP-8L-118mil
Product Description
The MBI6652 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, MBI6652
improves the efficiency of light loading. The output current of MBI6652 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 MBI6652 also features 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 MBI6652 builds thermal protection (TP) function inside. This function
protects IC from overheating (165°C) in various application conditions. MBI6652 provides thermal- enhanced packages
as well to handle power dissipation more efficiently. MBI6652 is available in SOT-23-6L and MSOP-8L packages.
Applications
Signage and Decorative LED Lighting
Automotive LED Lighting
High Power LED Lighting
Constant Current Source
Macroblock, Inc. 2015
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 - August 2015, VA.00
1 page  
MBI6652
Step-Down 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 Figure 3.)
Characteristics
Symbol
Condition
Min. Typ. Max. Unit
Supply Voltage
VIN -
6 - 30 V
Supply Current
IIN VIN=6V~30V
- 1 2 mA
Output Current
Output Current Accuracy
SW Dropout Voltage
Internal Propagation Delay
Time
IOUT
dIOUT/IOUT
△VSW
Tpd
-
350mA≤IOUT≤750mA,
IOUT=700mA
-
- 350 750
- ±3 ±5
- 0.315 -
100 196 300
mA
%
V
ns
Efficiency
Input voltage “H” level
of DIM
“L” level
Switch ON Resistance
Minimum Switch ON Time*
Minimum Switch OFF
Time*
Recommended Duty Cycle
Range of SW*
Operating frequency
CURRENT SENSE
Mean SEN Voltage
THERMAL OVERLOAD
Thermal Shutdown
Threshold*
Thermal Shutdown
Hysteresis*
DIMMING
Duty Cycle Range of PWM
Signal Applied to DIM pin
-
VIH
VIL
Rds(on)
TON,MIN
TOFF,MIN
Dsw
FreqMax
VSEN
TSD
TSD-HYS
DutyDIM
VIN=12V, IOUT=350mA, VOUT=10.8V
-
-
VIN=12V; refer to test circuit (b)
-
-
-
VIN=10V, V1=1V, refer to test circuit
(c)
-
-
PWM frequency: 100Hz ~ 1kHz
-
3.5
0
0.4
100
100
20
40
95
145
20
1
96
-
-
0.45
350
350
-
-
-
5
0.5
0.6
450
450
80
1400
%
V
V
Ω
ns
ns
%
kHz
100 105 mV
165 175 °C
30 40 °C
- 100 %
*Guaranteed by Design.
August 2015, VA.00
-5-
5 Page 
MBI6652
Step-Down LED Driver
5. Output Current vs. LED Cascaded Number at Various Input Voltage
800
780
760
740
720
700
680
660
1
Output current vs. LED cascaded number @ L1=22uH
RSEN=0.14Ω
L1=22uH
CIN=COUT=10uF
9VIN 12VIN
30VIN
24VIN
2 3 45
LED Cascaded Number
Fig 28. IOUT=715 mA
6
7
460
440
420
400
380
360
340
320
300
1
RSEN=0.27Ω
L1=22uH
CIN=COUT=10uF
9VIN 12VIN
30VIN
2 3 45
LED Cascaded Number
Fig 29. IOUT=370 mA
24VIN
67
Output current vs. LED cascaded number @ L1=68uH
745
RSEN=0.14Ω
740 L1=68uH
735 CIN=COUT=10uF
730
725
720
715 9VIN
710
12VIN
705
1
23 4 5
LED Cascaded Number
Fig 30. IOUT=715 mA
30VIN
24VIN
67
400
395
390
385
380
375
370
365
360
355
1
RSEN=0.27Ω
L1=68uH
CIN=COUT=10uF
9VIN 12VIN
23 4 5
LED Cascaded Number
Fig 31. IOUT=370 mA
30VIN
24VIN
67
Output current vs. LED cascaded number @ L1=100uH
740
RSEN=0.14Ω
735 L1=100uH
CIN=COUT=10uF
730
725
720
9VIN
715
12VIN
30VIN
24VIN
710
1
23 4 5
LED Cascaded Number
Fig 32. IOUT=715 mA
6
7
395
390
385
380
375
370
365
360
1
RSEN=0.27Ω
L1=100uH
CIN=COUT=10uF
9VIN
12VIN
30VIN
24VIN
2 3 45
LED Cascaded Number
Fig 33. IOUT=370 mA
6
7
- 11 -
August 2015, VA.00
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet MBI6652.PDF ] | |
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