DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver General Description Features The AHK1421 is a highly integrated, high efficiency LED backlight solution for portable appliances including mobile phones, smartphones, PDAs, PNDs etc. The device operates from a single-cell Li-ion or polymer battery in the voltage range from 2.7V to 5.5V. • Input Voltage Range: 2.7 to 5.5V • Drives up to 6 Series LEDs at 31mA • Integrated Boost Converter -- 1MHz Switching Frequency -- Up to 86% Efficiency -- Internal Compensation • 32 Steps - S2Cwire Single Wire Interface • Shutdown Current < 4µA • Integrated Protection Features -- Over-Voltage Protection for Open-LED Faults -- Over Temperature Protection • TSOT23-6 package An integrated boost (step-up) converter provides up to 28V output for driving up to 6 series LEDs. In conjunction with an external current setting ballast resistor, the AHK1421 uses a single wire, S2C digital interface to adjust the output current and therefore brightness, in 32 linear steps. The boost switching frequency operates at 1MHz to allow optimum efficiency and the smallest external L/C filtering components. Integrated protection features protects against, open circuit LEDs, short circuits and over temperature conditions. The AHK1421 is available in a Pb-free TSOT23-6 package. Applications • White LED backlight -- Feature phones -- Smartphones -- PDAs -- PMP -- PNDs -- Portable DVD Players Typical Application L = 10µH D1 2.7 - 5.5V 2.2µF VIN 2.2µF LX OUT AHK1421 S2C FB EN/SET GND Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 1 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Pin Descriptions Pin # Symbol Function 1 LX O 2 GND GND 3 FB I 4 5 6 EN/SET OUT VIN I O I Description Switching node of boost converter. Connect a 10µH inductor between this pin and input voltage source. Ground. Feedback pin from LED ballast resistor. Connect a resistor to ground to set the maximum LED current. Enable on/off control and S2Cwire interface input. Output of boost converter. Connect to the anode of the first LED in the series string. Input voltage to IC. Tied to input voltage source and input boost inductor. Pin Configuration TSOT23-6 (Top View) 2 LX 1 6 VIN GND 2 5 OUT FB 3 4 EN/SET Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Absolute Maximum Ratings1 Symbol Description VLX, VOUT VIN, VEN/SET VFB TJ TLEAD LX or OUT voltage to GND VIN, EN/SET to GND Voltage FB to GND Voltage Junction Operating Temperature Soldering Temperature (at leads, 10 sec.) Value 28 -0.3 to 6 -0.3 to VIN -40 to 140 300 Units V °C Thermal Information2 Symbol ΘJA PD Description Thermal Resistance Maximum Power Dissipation Value Units 139 0.719 °C/W W 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. 2. Mounted on an FR4 board. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 3 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Electrical Characteristics1 VIN = 3.6V, CIN = 2.2µF, COUT = 2.2µF, L = 10µH, RFB = 12.5Ω (IOUT = 20mA), TA = -40°C to 85°C unless otherwise noted. Typical values are at TA= 25°C. Symbol Description Conditions Power Supply VIN Input Voltage Range VUVLO Under Voltage Lockout Threshold VFB Feedback Voltage IQ Quiescent Supply Current IIN Supply Current ISHDN Input Shutdown Current VOVP Over-Voltage Protection Threshold RDS(ON) On-Resistance DMAX Maximum Duty Cycle fosc Oscillator Frequency S2C Control: EN/SET VEN/SET(L) EN/SET Input Low Threshold VEN/SET(H) EN/SET Input High Threshold IEN/SET EN/SET Input Leakage Current tEN/SET(LOW) EN/SET Input Low Time tEN/SET(HI_MIN) EN/SET Minimum High Time tEN/SET(HI_MAX) EN/SET Maximum High Time tEN/SET(OFF) EN/SET Input Off Timeout tEN/SET(LAT) EN/SET Latch Timeout Thermal Protection TJ(SD) Thermal Shutdown Threshold TJ(HYS) Thermal Shutdown Hysteresis VIN Rising Hysteresis ILED = 20mA No Switching, VEN/SET = 5V VEN/SET = 5V VEN/SET = 0V Min Typ Max Units 5.5 2.5 V 2.7 2.2 237 23 300 250 170 2.3 25 650 263 600 4.0 27 1000 90 TA = 25°C 1.0 0.4 VEN/SET = 5V, VIN = 5V 1.4 -1 0.3 100 1 75 75 500 500 140 15 mV mV µA mA µA V mΩ % MHz V V µA µs ns µs µs µs °C °C 1. The AHK1421 is guaranteed to meet performance specification over the –40°C to +85°C operating temperature range, and is assured by design, characterization and correlation with statistical process controls. 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Shutdown Current vs Input Voltage Quiescent Current vs Input Voltage 220 4.0 85°C 3.2 200 25°C 180 IQ (μA) ISD (μA) -40°C 2.4 160 1.6 140 0.8 85°C 120 0.0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 100 5.5 Input Voltage (V) 25°C -40°C 2.7 4.3 4.7 5.1 5.5 Switching Frequency vs Temperature (RFB = 8.3Ω, L = 10µH, 6LEDs) VIN = 3.6V, RFB = 12.4Ω, 6LEDs 1.10 Frequency (MHz) Efficiency (%) 3.9 Input Voltage (V) 90% 80% 70% VIN = 2.7V VIN = 3.0V 60% VIN = 3.6V VIN = 4.2V 50% 40% 3.5 Efficiency vs Output Current 100% 3.1 VIN = 5.0V VIN = 5.5V 0 4 8 12 16 20 24 28 1.02 0.98 0.94 0.90 -40 32 Output Current (mA) 1.06 -15 10 35 60 85 Temperature (°C) NMOS RDS(ON)N vs Input Voltage 1000 -40°C RDS(ON) (mΩ) 900 25°C 85°C 800 700 600 500 400 2.7 3.1 3.5 3.9 4.3 Input Voltage (V) 4.7 5.1 5.5 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 5 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Sink Current Accuracy vs Temperature Sink Current Accuracy vs Temperature 31.0 20.5 30.8 20.3 Current (mA) Current (mA) VIN = 3.6V, RFB = 8.3Ω, 6 LEDs 30.6 30.4 30.2 30.0 VIN = 3.6V, RFB = 12.4Ω, 6 LEDs 20.1 19.9 19.7 -40 -15 10 35 60 19.5 -40 85 Temperature (°C) 10 35 60 85 Temperature (°C) Feedback Voltage vs Temperature Feedback Voltage vs Input Voltage VIN = 3.6V, RFB = 12.4Ω, 6 LEDs 0.260 -15 0.260 0.256 0.252 0.252 VFB (V) VFB (V) 0.256 0.248 0.248 0.244 0.244 0.240 -40 -15 10 35 60 0.240 2.7 85 Temperature (°C) 3.1 3.5 4.3 4.7 5.1 OVP Low Threshold Voltage vs Input Voltage 24.5 26.0 85°C 85°C 24.1 25°C 25.6 25°C -40°C VOVPH (V) VOVPL (V) 25.2 24.8 23.3 22.5 5.5 24.0 3.1 3.5 3.9 4.3 Input Voltage (V) 6 -40°C 23.7 22.9 24.4 2.7 5.5 Input Voltage (V) OVP High Threshold Voltage vs Input Voltage 3.9 4.7 5.1 5.5 5.1 4.7 4.3 3.9 3.5 Input Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 3.1 2.7 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver EN Input High/Low Threshold Voltage vs Input Voltage 1.0 VENH VLX 20V/div VENL 0.9 VENH & VENL(V) Operation Waveform (VIN = 3.6V, CIN = 4.7μF, COUT = 2.2μF, RFB = 8 .3Ω, 6 LEDs) 0 0.8 IINDUCTOR 500mA/div 0.7 0 VOUT (AC) 0 50mV/div 0.6 0.5 0 ILED 20mA/div 0.4 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 Input Voltage (V) Time (800ns/div) Start Up Waveform Turn Off (V = 3.6V, C = 2.2μF, C = 2.2μF, R = 8.3Ω, 6 LEDs) (VIN = 3.6V, CIN = 2.2μF, COUT = 2.2μF, RFB = 8.3Ω, 6 LEDs) IN EN 2V/div EN 2V/div 0 VOUT 20V/div VOUT 20V/div 0 IIN 200mA/div IIN 200mA/div 0 ILED 20mA/div ILED 20mA/div 0 Time (1ms/div) ILED 20mA/div 0 0 0 Time (200μs/div) LED Current Transient 0 EN/SET 5V/div 0 VOUT 20V/div 0 IIN 200mA/div0 VOUT 20V/div IIN 200mA/div FB (VIN = 3.6V, CIN = 2.2μF, COUT = 2.2μF, RFB = 8.3Ω, S2C data 16 to 1, 15mA to 31mA, 6LEDs) (VIN = 3.6V, CIN = 2.2μF, COUT = 2.2μF, RFB = 8.3Ω, S2C data 1 to 16, 31mA to 15mA, 6 LEDs) EN/SET 5V/div OUT 0 LED Current Transient IN 0 0 0 ILED 0 20mA/div Time (200μs/div) Time (200μs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 7 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Functional Block Diagram LX VIN EN/SET Logic / Boost Control Osc. OUT OVP FB GND Functional Description Soft Start / Enable The AHK1421 is a highly integrated, high efficiency white LED backlight solution for mobile phones and all battery operated equipment. The device operates from regulated DC inputs, and single-cell Li-ion batteries in the voltage range 2.7V to 4.2V. The AHK1421 is enabled by EN/SET pulled to high after power on with a certain delay time. Internal soft start circuitry limits the input inrush current and eliminates output voltage overshoot. When EN/SET is pulled low, the AHK1421 enters a low-power, non-switching state. The total input current during shutdown is less than 4μA. The integrated boost (step-up) converter provides up to 28V output to drive up to 6 series LEDs. The LED current is set by a single external resistor up to 31mA. S2C single wire interface can enable and disable the IC and adjust the dimming in 32 steps. The AHK1421 is available in a Pb-free 6-pin TSOT23 package. The over-voltage protection function is designed to protect the boost converter during the fault of the open circuit of the LED string. The over-temperature function is targeted to protect the converter if an over-temperature fault occurs. 8 Over-Temperature Protection Thermal protection disables the AHK1421 when internal dissipation becomes excessive. Thermal protection disables the power MOSFET. The junction over-temperature threshold is 140°C with 15°C of temperature hysteresis. The output voltage automatically recovers when the over-temperature fault condition is removed. Over-Voltage Protection Over-voltage protection prevents damage to the AHK1421's pin during LED open-circuit or high output voltage conditions. An over-voltage event is defined as a condition where the voltage on the OUT pin exceeds the over-voltage protection threshold (VOVP). When VOVP has Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver S2Cwire™ Serial Interface reached the threshold limit, the converter stops switching and the output voltage decays. Switching resumes when the lower hysteresis limit of VOVP is reached, thereby maintaining an average output voltage between the upper and lower OVP thresholds. The LED current magnitude can be controlled by the EN/ SET pin using the S2Cwire interface. The interface records rising edges of the EN/SET pin and decodes them into 32 individual current level settings. Code 1 is full scale (maximum LED current), and Code 32 is 2% of the full scale. The modulo 32 interface wraps states back to state 1 after the 32nd clock. The counter can be clocked at speeds up to 1MHz, so intermediate states are not visible. The first rising edge of EN/SET enables the IC and initially sets the output LED current to full scale after 500µs tLAT. Once the final clock cycle is input for the desired brightness level, the EN/SET pin should be held high to maintain the device output current at the programmed level. The device is disabled 500μs after the EN/SET pin enters a logic low state. The EN/SET timing is designed to accommodate a wide range of data rates from 20kHz to 1MHz. LED Current Setting The maximum LED current is determined by the RFB resistor value. With a fixed 0.25V voltage on RFB, the LED maximum current is a linear ratio to the current flowing through RFB. ILED = VFB RFB Where VFB = 0.25V Table 1 lists examples of calculated RFB resistor values for different maximum LED current requirements. Higher accuracy RFB resistor can get higher accurate LED current. Maximum LED Current (mA) RFB (Ω) 31 30 20 15 12 10 8.06 8.33 12.5 16.66 20.83 25 After the first rising edge of EN/SET, the boost converter is enabled and reaches full capacity after the soft-start time. Exact counts of clock pulses for the desired current level should be entered on the EN/SET pin with a single burst of clocks. The counter refreshes each time a new clock input to the EN/SET pin is detected. A constant current is maintained as long as EN/SET remains in a logic high state. To save power, the boost converter is switched off after EN/SET has remained in the low state for at least the tOFF timeout period as shown in Figure 1. Table 1: Examples of RFB Values for Setting Maximum LED Current Levels. The LED dimming is controlled in 32-steps using the S2Cwire single-wire interface via the EN/SET pin. 32 S2Cwire rising-edge steps set the LED current from 100% to 2% of the maximum LED current. S2Cwire Serial Interface Timing THI TLO TOFF T LAT EN/SET 1 Data Reg 2 n-1 n ≤ 32 0 n 0 Figure 1: S2Cwire Timing Diagram. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 9 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Application Information LED Current Setting LED current dimming is controlled via the S2Cwire singlewire interface through the EN/SET pin in 32 steps. The S2Cwire interface programs the LED current from the maximum LED current set by RFB to 2% of the maximum LED current as shown in Table 2. S2Cwire Data LED Current (% IMAX) S2Cwire Data LED Current (% IMAX) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 100 97 94 90 87 84 81 77 74 71 68 65 61 58 55 52 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 48 45 42 39 35 32 29 26 23 19 16 13 10 6 3 2 verter LED driver application. MLC capacitors of type X7R or X5R are recommended to ensure good capacitance stability over the full operating temperature range. Table 3 lists some recommended capacitors for use with the AHK1421. Inductor Selection Inductor value, saturation current and DCR is most important parameter in selecting an inductor for AHK1421. The suitable inductance range for the AHK1421 is 4.7μH to 22μH. Higher inductance lowers the step-up converter's RMS current value. Together with lower DCR value of the inductor, it makes the total inductor power loss become much lower. Considering inductor size and cost, 10μH inductance is most suitable. Inductor saturation current is a key parameter in selecting an inductor. For the step-up converter, the peak inductor current is the DC input current plus half the inductor peak-to-peak current ripple. DC input current is given by: IIN = VOUT · ILED VIN · η Inductor peak-to-peak current ripple: IL_PP = Table 2: S2Cwire Dimming Control Current Settings. VIN · (VOUT - VIN) VOUT · L · f Inductor peak current: Capacitor Selection A 2.2μF/10V input capacitor is recommended and a 2.2μF/50V output capacitor is suitable as noted above. Multi-layer ceramic (MLC) capacitors provide small size and adequate capacitance, low parasitic equivalent series resistance (ESR) and equivalent series inductance (ESL), and are well suited for use as input, output and compensation capacitors in the AHK1421 step-up con- IL_PEAK = IIN + IL_PP VOUT · ILED VIN · (VOUT - VIN) = + 2 VIN · η 2 · VOUT · L · f For example, for a white LED with 3.2V VF and 20mA current at 82% efficiency, the inductor peak current for 6LEDs in a string is: IL_PEAK = 3.2 · 6 · 0.02 3.6 · (3.2 · 6 - 3.6) + = 276mA 3.6 · 0.82 2 · 3.2 · 6 · 10µ · 1M Manufacturer Part Number Value (μF) Voltage (V) Temperature Range Case Size Murata GRM188R61A225K GRM31CR71H225K 2.2 2.2 10 50 X5R X7R 0603 1206 Table 3: Examples of AHK1421 Input and Output Capacitor Selection. 10 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver For the inductor copper loss, the inductor DCR value together with the RMS current value flowing through the inductor leads to inductor conduction loss and also affects total efficiency. Larger DCR leads to larger conduction loss and decreases total efficiency. The inductor conduction loss can be estimated as shown in the equation: PL_LOSS = I2L_RMS · DCR = 1 · (I2L_MAX + I2L_MIN + IL_MAX · IL_MIN) · DCR 3 Schottky Diode Selection To achieve maximum efficiency, a low VF Schottky diode is recommended. The diode voltage rating should be higher than the OVP voltage. For an AHK1421 driving 6 white LEDs with up to 4V forward voltage, the diode voltage rating should be higher than 24V. Select a diode with DC rated current equal to the input current to allow an adequate margin for safe use. Table 5 gives some examples of recommended Schottky diodes for use with the AHK1421. IL_MAX and IL_MIN are the inductor peak current and minimum current. Table 4 gives some examples of recommended inductors for use with the AHK1421. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 11 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Manufacturer Part Number Inductance (μH) Sumida CDRH2D14-100 LQH3NPN100NM0 LQH3NPN100NG0 EPL2014-103MLC 10 10 10 10 Murata Coilcraft Maximum DC ISAT Current (mA) DCR (mΩ, typ) Size (mm) LxWxH Type 700 870 630 600 294 260 570 440 3.2x3.2x1.55 3.0x3.0x1.4 3.0x3.0x0.9 2.1x2.2x1.0 Shielded Non-shielded Non-shielded Shielded Table 4: Example of AHK1421 Inductor Selection Manufacturer TSC Diodes Central Part Number Maximum DC Blocking Voltage VR (V) Maximum DC Forward Current IF (mA) Nonrepetitive Peak Forward Surge Current IFSM (A) Forward Voltage VF (V) Case "Size WxLxH (mm)" SS13L SS14L SDM20U40 SD103BW CMDSH2-3 30 40 40 30 30 1100 1100 250 350 200 30 30 1 1.5 1 [email protected] [email protected] 0.37@20mA 0.37@20mA 0.32@15mA Sub SMA Sub SMA SOD523 SOD123 SDD323 1.9x3.8x1.43 1.9x3.8x1.43 0.9x1.7x0.65 1.7x3.85x1.35 1.35x2.6x1.0 Table 5: Example of AHK1421 Schottky Diode Selection 12 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Printed Circuit Board Layout Recommendations 2. Make sure the ground bump connected to the printed circuit board with large copper area for better thermal dissipation. 3. Put the input and output capacitor close to the IC as close as possible to get the best filter result. For best performance of the AHK1421, the following guidelines should be followed when designing the PCB layout: 1. Make the power trace as short and wide as possible, including the input/output power lines and switching node, etc. Schematic and Layout LX L1 10µH VOUT U1 AHK1421ICA J1 DC+ 2.7~5.5V 6 CIN VIN LX 2.2µF DC- OUT 4 AHK1421ICA White LED Driver EN/SET FB GND 2 J2 DS1 1 COUT 2.2µF 5 D1 3 D3 D2 D4 D5 D6 R4 50k V_MCU RFB 12.5 EN/SET S2Cwire/PWM Microcontroller R7 R8 R9 1k 1k 1k UP DOWN 1 2 3 4 U2 PIC12F675 VDD GP5 GP4 GP3 VSS GP0 GP1 GP2 8 6 7 5 C1 R5 0.1µF 1k R6 330 LED1 Red LED2 Green CYCLE Figure 2: AHK1421ICA Evaluation Board Schematic. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 13 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver (a) Top Layer (b) Bottom Layer Figure 3: AHK1421ICA Evaluation Board Component Part Number U1 AHK1421 U2 PIC12F675 C1 CIN, COUT S1-S3 D1, D2, D3, D4, D5, D6 DS1 GRM188R71H104KA01 GRM31CR71H225K PTS645TL50 RS-0805UW SS14L L1 CDRH3D18-100NC LED1 LED2 R4 R5,R7, R8, R9 R6 RFB CMD15-21SRC/TR8 CMD15-21UGC/TR8 Chip Resistor Chip Resistor Chip Resistor Chip Resistor Description S2C controlled, serial LED boost driver IC, TSOT23-6 8-bit CMOS, FLASH-based uC; SOIC-8 0.1µF, 50V, X7R, 0603 2.2μF, 50V, X7R, 1206 Switch Tact, SPST, 5mm 30mA White LED 0805 Schottky Diode Power Inductor 10μH 0.9A SMD Red LED; 1206 Green LED; 1206 50kΩ, 1%, 1/4W; 0603 1kΩ, 1%, 1/4W; 0603 330Ω, 1%, 1/4W; 0603 12.5Ω, 1%, 1/4W; 0603 Manufacturer Skyworks Microchip Murata Murata ITT Industries Realstar TSC Sumida Chicago Miniature Lamp Chicago Miniature Lamp Vishay Vishay Vishay Vishay Table 6: AHK1421ICA Evaluation Board BOM List 14 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Ordering Information Package Marking1 Part Number (Tape and Reel)2 TSOT23-6 T7XYY AHK1421ICA-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. Package Information TSOT23-6 0.40 ± 0.10 0.95 BSC 0.127 BSC 1.60 BSC 2.80 BSC Detail "A" End View Top View 1.00 ± 0.10 0.25 BSC 2.90 BSC 1.00 +10° -0° 0.45 ± 0.15 0.000 + 0.100 - 0.000 Side View Detail "A" 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012 15 DATA SHEET AHK1421 S2C Controlled, Serial LED Boost Driver Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. 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Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. 16 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202265A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 10, 2012