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PDF SIC9553A Data sheet ( Hoja de datos )
| Número de pieza | SIC9553A | |
| Descripción | High Precision Non-Isolated Buck LED Driver | |
| Fabricantes | SI Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SIC9553A (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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深圳深爱半导体股份有限公司
Shenzhen SI Semiconductors Co., LTD.
High Precision Non-Isolated Buck LED Driver
General Description
产品规格书
Product Specification
SIC9552A/9553A/9554A/9555A/9556A
The SIC9552A/9553A/9554A/9555A/9556A are high precision buck LED drivers. The chips are suitable for
85~265Vac universal input LED lighting applications.
The SIC9552A/9553A/9554A/9555A/9556A integrate high-precision sampling and compensation circuit, the
constant current of circuit can achieve accuracy under ± 3%. It can also achieve the adaptive demand between
both output inductor current and output voltage, so as to achieve good linear regulation and load regulation.
The SIC9552A/9553A/9554A/9555A/9556A integrate 500V power MOSFET. The simple peripheral structure
of the system can be benefit from its precise and stable adaptive technology. It is able to work without secondary
feedback circuitry or compensation circuitry. The SIC9552A/9553A/9554A/9555A/9556A can achieve precision
constant current control under a small number of peripheral devices and loosen parameter conditions. Such
features can greatly save both cost and size of the system. At the same time, it can ensure the consistency of
parameters when making mass production of LED lighting devices.
The SIC9552A/9553A/9554A/9555A/9556A have extensive protection features, including LED open protection,
LED short protection, current sampling resistor short protection, VDD under-voltage protection, over-temperature
protection.
Features
· Internal 500V Power MOSFET
· Ultra Low Operating Current
· No Auxiliary Winding
· ±3% LED Output Current Accuracy
· Inductor Current Critical Continuous Mode
· Excellent Line and Load Regulation
Typical Application
· Cycle-by-Cycle Current Limit
· LED Open Protection
· LED Short Protection
· Current Sampling Resistor Short Protection
· VDD Under-Voltage Protection
· Over Temperature Protection
Si semiconductors
SIC955XA
- 1 - SIC9552A/9553A/9554A/9555A/9556A_EN_Rev3.0
1 page  
深圳深爱半导体股份有限公司
产品规格书
Shenzhen SI Semiconductors Co., LTD.
Product Specification
High Precision Non-Isolated Buck LED Driver SIC9552A/9553A/9554A/9555A/9556A
Functional Block Diagram
APPLICATION INFORMATION
Function Description:
The SIC9552A/9553A/9554A/9555A/9556A are constant current driver chips dedicated for LED Lighting
applications. The chips integrate 500V power MOSFET which work under CRM mode. The chips are able to fit
in all working voltage range with excellent linear adjustment rate, load regulation and constant-current
characteristics. With very few external components, the converter achieves excellent constant current control. It
does not need auxiliary winding for powering the IC or voltage sensing, hence the system size and cost is greatly
reduced.
Start Up
The starting current of the chips is very low, after the system is powered on, VDD starting resistance start charge
the capacitance. When the VDD reach the open threshold range, the circuit begins to work. When the chips are
under normal operation condition, the internal circuit of the electric current can be as low as 135μA, and internal
system can offer an unique power mechanism. Thus, power supply can run normally without auxiliary winding
supply.
Sampling resistance and constant current control
The chips work under the CRM mode, and it has a reference voltage of 400mv inside. The reference voltage and
inductance in the system compares the original edge peak current calculation. Through the adjustment of the
Si semiconductors
- 5 - SIC9552A/9553A/9554A/9555A/9556A_EN_Rev3.0
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet SIC9553A.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
| SIC9553 | High-precision non-isolated Buck LED constant current driver chip |  Si semiconductors |
| SIC9553A | High Precision Non-Isolated Buck LED Driver | SI Semiconductors |
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