LED驱动控制器

SOLOMON SYSTECH
SEMICONDUCTOR TECHNICAL DATA
This document contains information on a product under development. Solomon Systech reserves the right to change
or discontinue this product without notice.
SSD1075 Rev 0.11 P 1/18 Apr 2010 Copyright © 2010 Solomon Systech Limited
Appendix: IC Revision History of SSD1075 Specification
Solomon Systech Apr 2010P 2/18 Rev 0.11 SSD1075
SOLOMON SYSTECH
SEMICONDUCTOR TECHNICAL DATA
SSD1075 Rev 0.10
P 3/17
Apr 2010
Solomon Systech
CONTENTS
1 FEATURES ..................................................................................................................................6 2 ORDERING INFORMATION...................................................................................................6 3 TYPICAL APPLICATION.........................................................................................................7 4 BLOCK INFORMATION.. (7)
4.1 BLOCK DIAGRAM.............................................................................................................................................7 4.2
BLOCK DESCRIPTION (8)
5 PIN ASSIGNMENT.....................................................................................................................9
6 9
7 10
8 10
9 11
9.1 9.2
A
10 16
10.1 10.2
T ABLE 1:O RDERING I NFORMATION (6)
T ABLE 2:P IN D ESCRIPTIONS (9)
T ABLE 3:MAXIMUM RATINGS (10)
T ABLE 4:ELECTRICAL CHARACTERISTICS (10)
Solomon Systech Apr 2010P 4/18 Rev 0.11 SSD1075
FIGURE1:SSD1075TYPICAL APPLICATION DIAGRAM (7)
FIGURE2:SSD1075BLOCK DIAGRAM(SOP14) (7)
FIGURE3:SSD1075PIN ASSIGMENT (9)
FIGURE4:BASIC SCR DIMMER CIRCUIT (11)
FIGURE5:LINE VOLTAGE AND DIMMING WAVEFORMS (11)
FIGURE6:SSD1075DIMMABLE ISOLATION APPLICATION DIAGRAM(CURRENT FEEDBACK) (12)
FIGURE7:VOLTAGE WAVEFORMS AFTER BRIDGE RECTIFIER (12)
FIGRUE8:SSD1075VIRTUAL LOADING CIRCUIT (13)
FIGURE9:SSD1075NO DIMMING ISOLATION APPLICATION DIAGRAM(VOLTAGE FEEDBACK) (14)
FIGURE10:SSD1075NO DIMMING ISOLATION APPLICATON DIAGRAM(CURRENT FEEDBACK) (14)
FIGURE11:SSD1075NO DIMMING BUCK APPLICATION DIAGRAM (15)
FIGURE12:SSD1075DIMMING BUCK APPLICATION DIAGRAM (15)
SSD1075 Rev 0.10 P 5/18 Apr 2010 Solomon Systech
Solomon Systech
Apr 2010
P 6/18
Rev 0.11 SSD1075
GENERAL DESCRIPTION
The SSD1075 is a PWM high-efficiency LED driver control IC. It allows efficient operation of High Brightness (HB) LEDs from voltage sources ranging from 8VDC up to 450VDC. The SSD1075 controls an external MOSFET at fixed switching frequency up to 300 kHz. The
• • • • • PWM Dimming feature support
• SCR dimming support (50/60Hz, generic SCR electrical dimmer) • Input Voltage Surge ratings up to 700V
• Over-voltage protection and over-current protection design support • Isolation and non-isolation application support • Full-isolation current sensing on loading design
• Build-in Over-temperature protection and under-voltage protection • 1.2ms operation soft start
• SOP8 package or SOP14 package
2 ORDERING INFORMATION
Table 1: Ordering Information
Ordering Part Number Package Form Remark
SSD1075HA50 SOP8EP MOQ: 1000 SSD1075HA23 SOP14 MOQ: 1000
3 TYPICAL APPLICATION
FIGURE 1: SSD1075 TYPICAL APPLICATION DIAGRAM
SSD1075 Rev 0.10 P 7/18 Apr 2010 Solomon Systech
Solomon Systech
Apr 2010
P 8/18
Rev 0.11 SSD1075
4.2 BLOCK DESCRIPTION Voltage Reference
The voltage reference is a circuit to provide supply independent, temperature independent and adjustable temperature dependent (to select +TC, -TC or zero TC) reference voltage.
Soft Start
Oscillator
The SCR dimming controller converts the 50/60Hz SCR dimmer input into 6.4 KHz LED dimming signal and mapping the input SCR duty range to 0~100% dimming range. It makes sure the application of SSD1075 could support the SCR dimming. The LED lighting product with SSD1075 can be compatible with existing 50/60Hz SCR dimming lighting applications easily.
5 PIN ASSIGNMENT
FIGURE 3: SSD1075 PIN ASSIGMENT
SSD1075 Rev 0.10 P 9/18 Apr 2010 Solomon Systech
7 MAXIMUM RATINGS
Table 3: MAXIMUM RATINGS
Solomon Systech Apr 2010P 10/18 Rev 0.11 SSD1075
9 APPLICATION
9.1 APPLICATOIN INFORMATION
FUNCTIONAL DESCRIPTION
The SSD1075 contains all the necessary circuitry to build a linepowered (mains powered) constant current LED driver whose output current can be controlled with a traditional SCR dimmer.
OVERVIEW OF SCR DIMMING
A basic "phase controlled" SCR dimmer circuit is shown in Figure 4
FIGURE 4: BASIC SCR DIMMER CIRCUIT
An RC network consisting of R1, R2, and C1 delay the turn on of the triac until the voltage on C1 reaches the
Figure 5b shows the output waveform from a typical dimmer. Figure 5c shows a waveform from a so-called reverse phase dimmer, sometimes referred to as an electronic dimmer. SSD1075 has been designed to support both forward and reverse phase SCR dimmer. TYPICAL APPLICATION DIAGRAM
Figure 6 shows the SSD1075 typical applcaiton
FIGURE 6: SSD1075 DIMMABLE ISOLATION APPLICATION DIAGRAM (CURRENT FEEDBACK)
rectifier. Figure 7c shows a typical triac dimmed voltage waveform after diode D3 (TP3) (Power Factor Correct circuit, VIN for SSD1075 ).
FIGURE 7: VOLTAGE WAVEFORMS AFTER BRIDGE RECTIFIER
SSD1075 VIRTUAL LOADING CIRCUITRY
An external series pass regulator (R6, D6, and Q2) translatesthe rectified line voltage to a level where it can be sensed bythe SCR pin on the SSD1075.
FIGRUE 8: SSD1075 VIRTUAL LOADING CIRCUIT
D6 is typically a 5V zener diode which forces transistor Q2 to “stand-off” most of the rectified line voltage. Having no capacitanceon the source of Q2 allows the voltage on the SCR pin to rise and fall with the rectified
of LED forward voltage binning.
The current feedback isolation applcation could overcome the problem. With the feedback from loading current, the circuit could control the LED loading current accurately. This application could adjust its driving voltage for different LED loaing for the same driving current by itself.
9.2 Application Diagram
FIGURE 9: SSD1075 NO DIMMING ISOLATION APPLICATION DIAGRAM (VOLTAGE FEEDBACK)
FIGURE 11: SSD1075 NO DIMMING BUCK APPLICATION DIAGRAM
10 PACKAGE INFORMATION 10.1 SOP8EP PACKAGE
10.2 SOP14 PACKAGE
Solomon Systech reserves the right to make changes without notice to any products herein. Solomon Systech makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Solomon
Systech assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any, and
all, liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “Typical” must be validated for each customer application by the customer’s technical experts. Solomon Systech does not convey any license under its patent rights nor the rights of others. Solomon
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design or manufacture of the part.
The product(s) listed in this datasheet comply with Directive 2002/95/EC of the European Parliament and of the council of 27 January 2004 on the restriction of the use of certain hazardous substances in electrical and electronic equipment and People’s Republic of China Electronic Industry Standard SJ/T 11363-2006 “Requirements for concentration limits for certain hazardous substances in electronic information products (电子信息产品中有毒有害物质的限量要求)”. Hazardous Substances test report is available upon request.。