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PDF MBI6663 Data sheet ( Hoja de datos )
| Número de pieza | MBI6663 | |
| Descripción | 1A Dimmable LED Driver | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Preliminary Datasheet
MBI6663
Step-Down, 1A Dimmable LED Driver
Features
6~65V wide input voltage range
Maximum 1A constant output current
PWM/DC input for dimming control
Hysteretic PFM operation eliminates external compensation design
Integrated power switch with 0.3ohm low Rds(on)
Full protections: UVLO/ Start-Up/ OCP/ Thermal/
LED Open/Short-Circuit
Only 5 external components required
Package MSL Level : 3
Surface Mount Device
GSD: TO-252-5L
Small Outline Package
Product Description
MBI6663 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 LED with only 5 external components. With hysteretic PFM control
scheme, MBI6663 eliminates external compensation design and makes
the design simple.
GD: SOP8L-150-1.27
The output current of MBI6663 can be programmed by an external resistor and dimmed via pulse width
modulation (PWM) or DC voltage through DIM pin to achieve higher efficiency linear current modulation.
MBI6663 features completed protection design to handle faulty situations. The start-up function limits the inrush
current while the power is switched on. Under voltage lock out (UVLO), 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. MBI6663 provides thermal-enhanced
SOP-8 and TO-252 packages to handle power dissipation more efficiently.
Applications
Signage and Decorative LED Lighting
High Power LED Lighting
Constant Current Source
Macroblock, Inc. 2015
6F-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30072, R.O.C.
TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: [email protected]
- 1 - May 2015, V1.00
1 page  
MBI6663
Step-Down, 1A Dimmable LED Driver
Electrical Characteristics
VIN=12V, VOUT=3.6V, L1=68μH, CIN=COUT=10μF, TA=25°C; unless otherwise specified.
Characteristics
Symbol
Condition
Min.
INPUT AND OUTPUT
Supply Voltage
Supply Current
Start-Up Voltage
Under Voltage Lock Out
Voltage
VIN
IIN
VSU
VUVLO
-
VIN=6V~65V
-
-
6
-
-
-
HYSTERESIS CONTROL
Mean Sense Voltage
Sense Voltage threshold
hysteresis
VSENSE
VSENSE,HYS
-
-
95
-
Internal Propagation
Delay Time
TPD
-
-
MOS SWITCH
Switch ON Resistance
Minimum Switch ON
Time*
Rds(on)
TON,min
VIN=12V
-
-
-
Minimum Switch OFF
Time*
TOFF,min
-
-
Recommended Duty
Cycle Range of SW*
Dsw
-
20
Maximum Operating
frequency
FreqMax
-
40
THERMAL OVERLOAD
Thermal Shutdown
Threshold*
TSD -
145
Thermal Shutdown
Hystersis*
TSD-HYS
-
20
PWM DIMMING
Input
voltage of
PWMD
“H” level
“L” level
VIH
VIL
-
-
2.5
-
Duty Cycle Range of
PWM Signal Applied to
DIM pin
DutyPWM PWM Frequency: 1kHz
0
ANALOG DIMMING
Analog Dimming Input
Clamp Voltage
VDIM.CLAMP -
-
Analog Dimming Input
Voltage turn off SW
VDIM. SWOFF -
-
OVER CURRENT PROTECTION
Over Current Threshold* OCP
-
-
*Parameters are not tested at production. Parameters are guaranteed by design.
Typ.
-
1.2
5.5
5.3
100
15
250
0.3
300
300
-
-
165
30
-
-
-
2.5
0.3
2.5
Max.
65
2
-
-
Unit
V
mA
V
V
105 mV
-%
400 ns
-
-
-
80
1000
Ω
ns
ns
%
kHz
175 °C
40 °C
65 V
0.3 V
100 %
-V
-V
-A
May 2015, V1.00
-5-
5 Page 
MBI6663
Step-Down, 1A Dimmable LED Driver
A. PWM dimming
The dimming of LEDs can be performed by applying PWM signals of DIM pin. A logic low (below 0.3V) at DIM
disables the internal MOSFET and shuts off the current flow to the LED array. An internal pull-up circuit ensures
that the MBI6663 is ON when DIM pin is unconnected. Therefore, the need for an external pull-up resistor will be
eliminated. The following Fig. 15 shows good linearity in dimming control.
1200.0
1000.0
800.0
200Hz
1kHz
10kHz
1200.0
1000.0
800.0
200Hz
1kHz
10kHz
600.0
600.0
400.0
200.0
0.0
0.0%
RSEN = 0.1Ω
VIN = 12V, 1-LED
Fsw = 930kHz
20.0% 40.0% 60.0% 80.0% 100.0%
PWM dimming duty, %
400.0
200.0
0.0
0.0%
RSEN = 0.1Ω
VIN = 24V, 3-LED
Fsw = 501kHz
20.0% 40.0% 60.0% 80.0% 100.0%
PWM dimming duty, %
(a) VIN = 12V, 1-LED
60.0
200Hz
50.0 1kHz
40.0 10kHz
(b) VIN = 24V, 3-LED
60.0
200Hz
50.0 1kHz
40.0 10kHz
30.0 30.0
20.0
10.0
0.0
0.0%
RSEN = 0.1Ω
VIN = 12V, 1-LED
Fsw = 930kHz
1.0% 2.0% 3.0% 4.0%
PWM dimming duty, %
5.0%
20.0
10.0
0.0
0.0%
RSEN = 0.1Ω
VIN = 24V, 3-LED
Fsw = 501kHz
1.0% 2.0% 3.0% 4.0%
PWM dimming duty, %
5.0%
(c) VIN = 12V, 1-LED
(d) VIN = 24V, 3-LED
Fig. 15 PWM dimming curve
B. Analog dimming
Users can also apply DC voltage directly to DIM for modulating LED current. The result is shown in the following
figures.
1200
1000
800
600
400
200
0
0
RSEN = 0.1Ω
VIN = 12V, 1-LED
L1 = 10uH
0.5 1 1.5 2
Analog voltage, V
2.5
Fig. 16 Analog dimming curve
- 11 -
May 2015, V1.00
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MBI6663.PDF ] | |
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