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PDF MBI6903 Data sheet ( Hoja de datos )
| Número de pieza | MBI6903 | |
| Descripción | AC/DC LED Controller | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MBI6903 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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Macroblock
Preliminary Datasheet
Features
z Efficiency> 85% when VAC =110V, ILED=100mA, VLED =80V
z PWM switching control
z Operation with active power factor correction
z THD < 15% when VAC =110V, ILED=100mA, VLED =80V
z Full protections: OTP/UVLO/OVP/OCP/LED open-/short-circuit
z Current setting accuracy within ±5%
z Full range line regulation within 1.7%
z Available in SOP-8L package
MBI6903
AC/DC LED Controller
Small Outline Package
GD: SOP8L-150-1.27
Product Description
MBI6903 is a high efficiency buck-boost AC/DC controller designed to deliver constant current output. The input
voltage range of MBI6903 application is universal from 85VAC to 265VAC. It is featured by a PWM control scheme.
MBI6903 is designed to operate with active power factor correction (PFC) circuit and is therefore capable of
maintaining system power factor greater than 0.9 with proper design. MBI6903 regulates the output current within
±5% of the preset current by well controlling the external MOSFET. MBI6903 also protects the controller from fault
conditions, inclusive of under voltage lock-out (UVLO), over voltage protection (OVP) and over current protection
(OCP). To ensure the system reliability, over temperature protection (OTP) is built-in to prevent IC from over
temperature (155°C) by turning off the external MOSFET. Once the temperature drops below 125°C, the external
MOSFET will resume working. MBI6903 is available in SOP-8L package.
Applications
z T-8 CFL Replacement LED Solution
z E26/E27 Light Bulb Alternative LED Solution
z Flat Panel Lighting Solution
z General Illuminations
©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 - December 2011, V1.00
1 page  
MBI6903
AC/DC LED Controller
Maximum Ratings
Operation above the maximum ratings may cause device failure. Operation at the extended periods of the maximum
ratings may reduce the device reliability.
Characteristic
Symbol
Rating
Unit
Supply Voltage
VDD -0.4~44
V
Sustaining voltage at VCS pin
VCS 7
V
Sustaining voltage at VFB pin
Power Dissipation
(On 4-Layer PCB, Ta=25°C)
Thermal Resistance
(By simulation, on 4-Layer PCB)*
GD Type
VFB
PD
Rth(j-a)
7
3.13
40
V
W
°C/W
Junction Temperature
Tj,max
150**
°C
Operating Ambient Temperature
Topr -40~+85
°C
Storage Temperature
Tstg -55~+150
°C
*The PCB size is 76.2mm*114.3mm in simulation. Please refer to JEDEC JESD51.
** Operation at the maximum rating for extended periods may reduce the device reliability; therefore, the suggested
junction temperature of the device is under 125°C.
Note: The performance of thermal dissipation is strongly related to the size of thermal pad, thickness and layer
numbers of the PCB. The empirical thermal resistance may be different from simulative value. Users should plan for
expected thermal dissipation performance by selecting package and arranging layout of the PCB to maximize the
capability.
- 5 - December 2011, V1.00
5 Page 
MBI6903
AC/DC LED Controller
Power MOSFET ( Q1)
In this sample design, the recommended rating voltage of Q1 is (VIN,MAX + VLED) x 1.2 = 457.68 V, and the
recommended rating current of Q1 is 1A x 1.2 = 1.2A, individually. Thus, the STD4NK60Z-1 that manufactured from
ST with 600V rating voltage, 4A rating current, and 1.76Ω Rds(on) is selected.
Supply Capacitor (CDD) and Charging Resistor (RS)
For general applications, a 4.7µF ceramic capacitor with 50V rating voltage (X7R or X5R) for CDD is recommended.
To consider the sustaining voltage of RS, it is recommended to use two 510kΩ resistors in series as RS.
Supply Current Limiter (RLIM)
In this application, the recommended resistance of RLIM is 100Ω.
Freewheeling Diode (DO) and Supply Diode (DS)
In this application, the recommended maximum reverse voltage of DO is (VIN,MAX + VLED) x 1.2 = 457.68 V, and
recommended rating current of DO is 1A x 1.2 = 1.2A, individually. The recommended maximum reverse voltage of
DS is(VIN,MAX + VDD,OVP) x 1.2 = (311 + 44) x 1.2 = 426V, and the recommended rating current of Ds is 100mA.
Therefore, the ER2J that manufactured from PANJIT with 600V rating voltage and 2A rating current for both DO and
DS is selected.
Bridge Diode (D1, D2, D3, and D4)
In this application, the recommended maximum reverse voltage of the bridge diode is VIN,MAX x 1.2 = 373.2 V, and the
recommended rating current of the bridge diode is 42.20mA.Therefore, the B6S that manufactured from PANJIT with
600V rating voltage and 0.5A rating current is selected.
Zener Diode (ZDD)
In general, the 43V and 500mW zener diode is recommended.
Compensator Capacitors (CEAO and CCOMP)
In this application, a 1µF ceramic capacitor (X7R or X5R) for CEAO and a 4.7nF ceramic capacitor (X7R or X5R) for
CEAO are recommended.
Zener Diode ( ZD1)
The ZD1 is to shift the OVP threshold of MBI6903 for applications that the output voltage is above 37V. The zener
voltage of ZD1 is VIN,MAX VLED,MIN – VDS,MAX – 25 = 44V. Therefore, a 43V zener diode is selected.
Output Transient Voltage Suppressor (TVSO)
To protect the LED, the output transient voltage suppressor (TVSO) is needed. The breakdown voltage of TVSO is
VDR,MIN VLED,OVP = VLED + VDD,OVP – 25 = 81.4 V. Therefore, an 81V TVS is selected.
Output Capacitor (COUT)
In this application, a 47µF electrolytic capacitor with 250V rating voltage for COUT is recommended.
- 11 -
December 2011, V1.00
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MBI6903.PDF ] | |
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