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PDF MBI6703 Data sheet ( Hoja de datos )
| Número de pieza | MBI6703 | |
| Descripción | DC-DC Boost Controller | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MBI6703 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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Macroblock
Preliminary Datasheet
MBI6703
DC-DC Boost Controller with Min. Selector
Features
z 10V~30V wide input voltage range
z Adjustable switching frequency: 75KHz to 250KHz
z Peak current mode control
z External soft-start function
z Drive external power MOSFET
z Minimum selector supports up to 4 feedback inputs
z Full protections:
Under voltage lockout, UVLO
Over temperature protection, OTP
Over voltage protection, OVP
Over current protection, OCP
Input voltage protection, IVP
z TSSOP-24 package
Thin Shrink SOP
GTS: TSSOP24L-173-0.65
Product Description
MBI6703 is a frequency-adjustable, peak current mode step-up DC/DC controller to drive external constant current
LED drivers, ex. MBI1838, with multi-strings. It is designed for large LCD panels that employ an array of LEDs as the
light source. MBI6703 accepts wide input voltage range from 10V to 30V.
MBI6703 can receive external pulse width modulation (PWM) dimming control signal to turn on/off the output voltage
according to the dimming.
MBI6703 is built with complete protection features to protect the controller from fault situations. The soft-start
function eliminates the inrush current while the power is on. The integrated protections, UVLO, OVP, OCP, OTP, and
IVP, avoid MBI6703 from being damaged from fault conditions.
MBI6703 supports 4 external feedbacks from the external constant current LED drivers in parallel, and builds in a
minimum voltage selector to choose the lowest voltage to make sure all the arrays of LEDs are well controlled.
MBI6703 drives an external MOSFET, which provides good efficiency and maximizes operating voltage. The feature
of selectable switching frequency allows optimization of the component size and system efficiency.
MBI6703 is available in a TSSOP-24L-173-0.65 package.
Applications
z LCD TV
©Macroblock, Inc. 2010
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 - December 2010, V1.00
1 page  
MBI6703
DC-DC Boost Controller with Min. Selector
22
2, 7, 14, 18,
20, 23
-
VSOVP
NC
Thermal Pad
Over voltage sense input.
No connection.
Power dissipation terminals connect to GND*.
*To eliminate the noise influence, thermal pad is suggested to connect to GND on PCB. In addition, a
heat-conducting copper foil on PCB soldered with thermal pad will improve the desired thermal conductivity.
- 5 - December, 2010, V1.00
5 Page 
MBI6703
DC-DC Boost Controller with Min. Selector
100
98
96
94
92
VIN=36V
90 VIN=24V
VIN=12V
88
0.0 0.3 0.6 0.9 1.2 1.5
ILED (A)
Fig. 16 Efficiency versus ILED, switching frequency is
100KHz
100
98
96
94
92
90 VIN=36V
VIN=24V
88
0.0 0.3 0.6 0.9 1.2 1.5
ILED (A)
Fig. 18 Efficiency versus ILED, switching frequency is
250KHz
20
15
10
5
0
0
10 20
30 40 50 60
VCCH(V)
Fig. 20 Quiescent current in shutdown mode
100
98
96
94
92
VIN=36V
90 VIN=24V
VIN=12V
88
0.0 0.3 0.6 0.9 1.2 1.5
ILED (A)
Fig. 17 Efficiency versus ILED, switching frequency is
150KHz
700
660
620
580
540
500
0
10 20 30 40 50 60
VCCH(V)
Fig. 19 Quiescent current in normal operation
0.65
0.64
0.63
0.62
0.61
0.60
0.59
0.58
0.57
0.56
0.55
10 20 30 40 50 60
VCCH(V)
Fig. 21 Internal reference voltage of FB0 versus VCCH
- 11 -
December, 2010, V1.00
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet MBI6703.PDF ] | |
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