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SSD1030 product preview boost regulating white led drivers i
contents 1 general description ............................................................................................................ 1 2 features ....................................................................................................................................... 1 3 ordering information ....................................................................................................... 1 4 block diagram ......................................................................................................................... 2 5 SSD1030 pin assignment and marking .......................................................................... 2 6 pin descriptions ...................................................................................................................... 3 7 functional block descriptions ................................................................................... 4 8 input voltage setting ........................................................................................................ 4 9 led current setting ............................................................................................................ 4 10 maximum ratings ................................................................................................................... 5 11 dc characteristics .............................................................................................................. 6 12 ac characteristics .............................................................................................................. 6 13 application examples ......................................................................................................... 7 14 package dimensions ............................................................................................................. 9 ii
tables table 3-1: ordering information .................................................................................................................... 1 table 6-1: pin descriptions ........................................................................................................................... 3 table 9-1: i led configuration reference table ............................................................................................. 4 table 10-1: maximum ratings (voltage referenced to v ss ) ........................................................................ 5 table 11-1: dc characteristics ..................................................................................................................... 6 table 12-1: ac characteristics ..................................................................................................................... 6 table 13-1: typical component values of open circuit current protection application ................................ 7 table 13-2: typical component values of typical application. .................................................................... 8 figures figure 4-1: block diagram of SSD1030 ............................................................................................................. 2 figure 5-1: pin assignment diagram (topview) .................................................................................................. 2 figure 13-1: typical application with open circuit current protection ................................................................ 7 figure 13-2: typical application of li-ion powered driver for 3 white leds ...................................................... 8 figure 14-1: package dimension ....................................................................................................................... 9 figure 14-2: recommended pcb landing pattern ............................................................................................ 10 iii
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solomon systech semiconductor technical data this document contains informati on on a product under development. solomon systech reserves the right to change or discontinue this product without notice. http://www.solomon-systech.com SSD1030 rev 0.11 p 1/11 dec 2005 copyright ? 2005 solomon systech limited 1 general description SSD1030 is a boost regulating white led driver designe d to drive up to 4 white leds in series with constant current. led brightness can be adjusted by pwm (pulse width modulation) control or resistor value. 2 features ? ? ? ? ? ? ? ? ?
solomon systech dec 2005 p 2/11 rev 0.11 SSD1030 4 block diagram figure 4-1: block diagram of SSD1030 oscillator logic control v ss shdn# fb v in feedback circuit power switch sw 5 SSD1030 pin assignment and marking figure 5-1: pin assignment diagram (topview) 1 2 3 sw v ss fb v in shdn# 5 4 aaxx aa: SSD1030ja02 xx: manufacturing code
6 pin description s table 6-1: pin descriptions pin name type pin no. description sw io 1 power switch switching terminal connecting to external inductor and diode. the signal at sw has high frequency sw itching properties. connecting trace should have minimized length to reduce emi. v ss p 2 ground pin. fb io 3 feedback pin. a r fb resistor connected between this pin and ground controlled the led current (i led ). relationship between r fb and i led is: i led = reference voltage / r fb where reference voltage is the voltage at fb, which is 95mv typical. shdn# io 4 shutdown pin. h ? normal operation l ? shutdown mode v in p 5 input power supply. note (1) normal operation is to connect the shdn# pin with v in ; shutdown mode is to connect the shdn# pin with v ss . SSD1030 rev 0.11 p 3/11 dec 2005 solomon systech
7 functional block descriptions 7.1 feedback circuit the feedback block senses the voltage at fb pin and maintains constant current output i led . 7.2 logic control this is the main control logic block for the operation of the power switch. when shdn# connects to v in , it generates clocks to the power switch according to the feedback circuit sensing inputs. when shdn# connects to v ss , ic operation turns off. 7.3 oscillator the internal oscillator generates cl ock signal for dc/dc switching operations. 7.4 power switch the power switch is the basic element of a boost converter. the control logic block controls the on-off operation of the power switc h to achieve boost up function. 8 input voltage setting for led voltage required is larger than 14v, v in voltage should be larger than or equal to 3.0v. 9 led current setting the current passing through the led can be set by external resistor r fb (refer to application circuit figure 13-1 ) the relationship between r fb and i led is: i led = reference voltage / r fb where reference voltage = 95mv typical table 9-1: i led configuration reference table i led current (ma) r fb resistance ( ? ) 2 47.50 4 23.75 6 15.83 8 11.88 10 9.50 12 7.92 14 6.79 16 5.94 18 5.28 20 4.75 solomon systech dec 2005 p 4/11 rev 0.11 SSD1030
10 maximum ratings table 10-1: maximum ratings (voltage referenced to v ss ) symbol parameter value unit v in supply voltage -0.3 to 6.0 v v sw switch voltage 18 v i out-max output current drive 25 ma t a operating temperature -40 to +85 c t stg storage temperature -65 to +150 c t j junction temperature 125 c note the device contains esd protection with the following voltage level: human body model (hbm) 2.0kv per jedec jesd22 standard for all pins. machine model (mm) 200v per jedec jesd 22 standard for all pins except sw pin. machine model (mm) 150v for sw pin. latch-up rating: 200ma per jedec jesd78standard maximum ratings are those values beyond wh ich damages to the device may occur. func tional operation should be restricted to the limits in the electrical characteristic s tables or pin description section. this device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. reliability of operation is enhanced if unused input is connected to an appropriate logic voltage level (e.g ., either v ss or v in ). unused outputs must be left open. this device is not radiation protected. SSD1030 rev 0.11 p 5/11 dec 2005 solomon systech
11 dc characteristics conditions: unless otherwise specified, voltage referenced to v ss v in = 3.0v table 11-1: dc characteristics symbol parameter test condition min typ max unit v in operating voltage 2.4 - 5 v i std shut down supply current 1 ua i op operating current quiescent current, no loading (1) 250 ua v fb feedback voltage 86 95 104 mv i swlim switch current limit 250 ma i swleakage switch leakage current 1 ua v ih input logic high voltage 0.8 x v in v v il input logic low voltage 0.2 x v in v note (1) no loading condition applies only for the application circuit in figure 13-1: typical application with open circuit current protection . 12 ac characteristics conditions: unless otherwise specified, voltage referenced to v ss v in = 3.0v table 12-1: ac characteristics symbol parameter test condition min typ max unit f sw switching frequency v fb =0v 600 khz d cyc maximum duty cycle 85 % solomon systech dec 2005 p 6/11 rev 0.11 SSD1030
13 application examples figure 13-1: typical application wi th open circuit current protection v in sw shdn# v ss fb v in c in 1uf c out l1 r fb d1 i led d2 r1 table 13-1: typical component values of open circuit current protection application components typical value remark c in 1uf, 16v c out 0.22uf, 25v d1 30v, 200ma schottky diode, e.g. on semiconductors bat54alt1 d2 18v, 0.1ma rating zener diode, do-35 package, e.g. 1n4112 l1 22uh, 300ma r fb 4.75 , 1% feedback resistor r1 1k , 5% SSD1030 rev 0.11 p 7/11 dec 2005 solomon systech
figure 13-2: typical application of li-ion powered driver for 3 white leds v in sw shdn# v ss fb v in c in 1uf c out l1 r fb d1 i led table 13-2: typical component valu es of typical application. components typical value remark c in 1uf, 16v c out 0.22uf, 25v d1 30v, 200ma schottky diode, e.g. on semiconductors bat54alt1 l1 22uh, 300ma r fb 5.6 ohm, 1% feedback resistor solomon systech dec 2005 p 8/11 rev 0.11 SSD1030
14 package dimensions figure 14-1: package dimension detail a detail a min typical max a- -1 . 1 a1 0 - 0.1 a2 0.7 0.9 1 b 0.3 - 0.5 b1 0.3 0.4 0.45 c0 . 0 8- 0 . 2 c1 0.08 0.13 0.16 d-2 . 9- e-2 . 8- e1 - 1.6 - l 0.3 0.45 0.6 l1 - 0.6 - l2 - 0.25 - r0 . 1 - - r1 0.1 - 0.25 e - 0.095 - e1 - 1.9 - 0 4 8 14 10 12 symbols dimensions in millimeters SSD1030 rev 0.11 p 9/11 dec 2005 solomon systech
figure 14-2: recommended pcb landing pattern unit: mm solomon systech dec 2005 p 10/11 rev 0.11 SSD1030
solomon systech reserves the right to make changes without no tice to any products herein. solomon systech makes no warranty, representation or guarantee regarding the su itability of its products for any particul ar purpose, nor does solomon systech assu me any liability arising out of the application or use of any product or circuit, and speci fically disclaims any, and all, liability, including without limitation consequential or incidental dama ges. ?typical? parameters ca n and do vary in different applications. all operating p arameters, including ?typical? must be validated for each customer applica tion by the customer?s technical experts. solomon systech does n ot convey any license under its patent rights nor the rights of others. solo mon systech products are not designed, intended, or authorize d for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, o r for any other application in which the failure of the solomon systech product could create a situation where personal injury or death may occ ur. should buyer purchase or use solomon systech products for any such unint ended or unauthorized applicati on, buyer shall indemnify and h old solomon systech and its offices, employees, subsidiaries, affilia tes, and distributors harmless ag ainst all claims, costs, dama ges, and expenses, and reasonable attorney fees aris ing out of, directly or indi rectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if su ch claim alleges that solomon systech was negligent regarding the design or manufactu re of the part. http://www.solomon-systech.com SSD1030 rev 0.11 p 11/11 dec 2005 solomon systech

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