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PDF MBI6661 Data sheet ( Hoja de datos )
| Número de pieza | MBI6661 | |
| Descripción | 1A LED Driver | |
| Fabricantes | Macroblock | |
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Macroblock
Datasheet
MBI6661
60V, Step-Down, 1A LED Driver
Features
Max. 1A constant output current
97% efficiency @ input voltage 48V, loading condition 350mA, 12
LEDs in series
9~60V wide input voltage range
Surface Mount Device
Hysteretic PFM eliminates external compensation design
Settable output current
Integrated power switch with 0.35ohm Rds(on)
Full protections: UVLO/Start-Up/OCP/ Thermal/ LED Open-/ LED
GSD: TO-252-5L
Short- Circuited
Only 5 external components required
Package MSL Level : 3
Small Outline Package
Product Description
MBI6661 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 5 external components. By hysteretic PFM control scheme,
GD: SOP8L-150-1.27
MBI6661 omits the external compensation design.
The output current of MBI6661 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 on. MBI6661 also features under voltage lock out (UVLO), over temperature protection (OTP), and over
current protection (OCP) to guard the system to be robust and keep the IC away from being damaged resulting
from LED open-circuited, short-circuited and other abnormal events.
Additionally, to ensure the system reliability, MBI6661 builds thermal protection (TP) function inside. This function
protects IC from overheating in various application conditions. MBI6661 provides thermal-enhanced packages as
well to handle power dissipation more efficiently.MBI6661 is available in TO-252, SOP-8 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  
MBI6661
60V, Step-Down, 1A LED Driver
Electrical Characteristics
Test condition: VIN=24V, VOUT=3.6V, L1=68μH, CIN=COUT=10μF, TA=25°C; unless otherwise specified.
Characteristics
Symbol
Condition
Min. Typ. Max.
Supply Voltage
VIN -
9 - 60
Supply Current
IIN VIN=9V~60V
- 1.5 4
Output Current
Output Current Accuracy
SW Dropout Voltage
Internal Propagation
Delay Time
IOUT
dIOUT/IOUT
△VSW
Tpd
-
350mA≤IOUT≤1000mA,
IOUT=350mA
-
- - 1000
- ±3 ±5
- 0.3
-
100 200
300
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*
Maximum Operating
frequency
CURRENT SENSE
-
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
-
OVER CURRENT PROTECTION
Over Current Threshold*
DIMMING
Duty Cycle Range of
PWM Signal Applied to
DIM pin
DutyDIM
VIN=48V, IOUT=350mA, VOUT=43V
-
-
VIN=12V; refer to test circuit (b)
-
-
-
-
VIN=10V, V1=1V, refer to test circuit
(c)
-
-
TA=-40~85°C
-
-
-
PWM frequency: 100Hz~1kHz
-
2.5
-
-
100
100
20
40
95
145
20
7.4
0.15
7.6
-
1
97
-
-
0.35
350
350
-
-
100
155
30
7.8
0.25
8.0
1.7
-
-
-
0.8
-
450
450
80
1000
105
175
40
8.2
0.35
8.4
-
100
*Parameters are not tested at production. Parameters are guaranteed by design.
Unit
V
mA
mA
%
V
ns
%
V
V
Ω
ns
ns
%
kHz
mV
°C
°C
V
V
V
A
%
August 2015, VA.00
-5-
5 Page 
MBI6661
Dimming and Switching Waveforms
VDIM
VSW
VOUT
IOUT
60V, Step-Down, 1A LED Driver
Dimming Waveform
VDIM
VSW
VOUT
IOUT
VIN=48V, RSEN=0.1Ω, DSW=50%
Fig. 31
VIN=48V, RSEN=0.1Ω, DSW=80%
Fig. 32
Switching Waveform
VIN
VSW
VOUT
IOUT
VIN=12V, RSEN=0.28Ω, 1-LED
Fig. 33
- 11 -
August 2015, VA.00
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet MBI6661.PDF ] | |
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