austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: [email protected] Please visit our website at www.ams.com D at ash ee t A S1 3 9 0 A , A S1 3 9 0 B Hi g h P o w e r B o o s t C o n t r o lle r a n d B u c k C o n v e r te r f o r L E D B a c k lig h t 2 Key Features The continuous conduction mode of the AS1390 provides superior bandwith and transient response. The two output voltages for the boost controller (2D and 3D mode) can be programmed with an external resistor divider. The buck converter is optimized for suppling a µP with 5V. High Efficiency: Up to 95% Supply Voltage Range: 10V to 30V Boost Output Current: up to 3A Continuous Conduction Mode Undervoltage Lockout with hysteresis Overvoltage, Overcurrent and Overtemperature Protection Low Dropout Operation: 90% Duty Cycle Buck always ON, Boost with enable PIN Packages: am lc s on A te G nt st il The AS1390A is available in a 20-Pin QFN (4x4mm) package, the AS1390B comes in a 16-pin SOIC package. al id The AS1390A, AS1390B is a high-power, constant-frequency boost controller with an integrated buck converter. The AS1390A can be used for the boost converter in TV sets which are optimized for 2D and 3D mode. AS1390B is designed for single mode operation. lv 1 General Description - 20-Pin QFN (4x4mm) - 16-pin SOIC 3 Applications The device is ideal for LED backlighting for LCD - TV sets and monitors. Te ch ni ca Figure 1. AS1390A - Typical Application www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 1 - 20 AS1390A, AS1390B Datasheet - A p p l i c a t i o n s Te ch ni ca am lc s on A te G nt st il lv al id Figure 2. AS1390B - Typical Application www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 2 - 20 AS1390A, AS1390B Datasheet - P i n A s s i g n m e n t s 4 Pin Assignments am lc s on A te G nt st il lv al id Figure 3. Pin Assignments (Top View) 4.1 Pin Descriptions Pin Number AS1390A AS1390B 13 5 3 10 6 12 8 7 9 10 11 2 13 - VDDH UVLO COMP_2D COMP_3D VBIAS VDDL VDDM FB_2D FB_3D GATE SENSE_2D SENSE_3D SENSE_GND P A I/O A I/O A I/O A I/O A I/O A I/O A I/O A I/O A I/O A I/O A I/O A I/O LX A I/O 8 ch 1 6 1, 16 4 Pin Typ ni 19 14 17 5 4 15 Pin Name ca Table 1. Pin Descriptions 9 7 3 14 FB_BUCK VDDHP PGND AGND A I/O P P P 12 15 EN_BOOST D IN 13 - MODE_3D D IN - Exposed Pad n.c. Te 2 20 16 11 Description Supply Voltage Undervoltage Lockout Compensation Network 2D. default Compensation Network 3D High Side Regulator Output. Connect this pin to the Supply rail via a capacitor. Internal Regulator Output Drive Voltage Regulator Output FB Input 2D. default FB Input 3D Gate Driver Output Current Sense Input 2D. default Current Sense Input 3D Current Sense Input GND. (only for AS1390A) Inductor Connector. Connect an inductor from LX to the output of the buck converter Feedback Buck Pin. Connect this pin to the output of the buck converter Supply for DCDC Buck-Converter Power Ground Analog Ground Enable. Enables the Boost-Controller. 1 = Normal operation; 0 = Shutdown; Selection for 3D Mode. (only for AS1390A) 1 = 3D; 0 = 2D; Exposed Pad. This pad is not connected internally. Can be left floating or connect to GND to achieve an optimal thermal performance. www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 3 - 20 AS1390A, AS1390B Datasheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Max Units VDDH to AGND 40 V VDDL to AGND 5.0 V VDDM to AGND 20 V VDDH - 5.0 VDDH + 0.3 V PGND to AGND -0.3 +0.3 V EN_BOOST, FB_2D, FB_3D, FB_BUCK AGND - 0.3 VDD + 0.3 V am lc s on A te G nt st il VBIAS to AGND Input Current (latch-up immunity) 100 mA Human Body Model @ VDDH, VDDM, LX, VBIAS, GATE, VDDHP 4 kV Human Body Model all other pins 2 kV +150 ºC +150 ºC Electrostatic Discharge Notes al id Min lv Parameter Electrical Parameters -100 Norm: JEDEC 78 Norm: MIL 883 E method 3015 Temperature Ranges and Storage Conditions Junction Temperature (TJ-MAX) Storage Temperature Range -65 Package Body Temperature Humidity non-condensing 5 +260 ºC 85 % 1 Represents a max. floor life time of unlimited for 20-Pin QFN (4x4mm) 3 Represents a max. floor life time of 168h for 16-pin SOIC Moisture Sensitive Level Te ch ni ca The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/ JEDEC J-STD-020 “Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. The lead finish for Pb-free leaded packages is matte tin (100% Sn). www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 4 - 20 AS1390A, AS1390B Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics VDDH = 24V, EN_BOOST = 5V, unless otherwise noted. Typical values are at TA=25°C. All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Table 3. Electrical Characteristics Parameter Conditions TA Operating Temperature Range -40 TJ Operating Junction Temperature Range -40 1 Min Typ Supply Voltage Range 10 VFB Feedback Voltage 1.25 IQ Quiescent Supply Current 1 Boost Converter Output Voltage Range 2 30 Accuracy -2 +85 °C +125 °C 30 V V mA 90 V +2 % 3000 mA IOUT Buck Output current Buck Converter 100 mA fSW Buck Switching Frequency 1000 kHz RON_Buck Driver ON Resistance Buck 3 Ω RSWON1 Driver ON Resistance Top 8 Ω RSWON2 Driver ON Resistance Bottom 8 Ω VDRV,peak Driver Peak Voltage (voltage @ VDDM) 9 V tRISE am lc s on A te G nt st il VOUT Boost Units lv VDDH Max al id Symbol Driver Pin Rise Time 25 ns Driver Pin Fall Time 25 ns UVLO Reference Voltage 1.35 V Hysteresis Current 20 µA IOUT Boost Output current Boost Converter fSW Buck Converter VOUT Buck IHYST kHz Output Voltage Range 5 V IOUT Buck = 50mA -5.0 CGS = 3nF, VDDM = 9V, VDRV = 0 to 3V ch ni Undervoltage Lockout Enable 275 ca tFALL 1000 Boost Swichting Frequency Accuracy Driver Stage VREF 3 Logic high input threshold VIL,EN VIL,MODE Logic low input threshold Te VIH,EN VIH,MODE www.austriamicrosystems.com/Power-Management/AS1390 +5.0 1.8 V 0.8V Revision 1.04 % V 5 - 20 AS1390A, AS1390B Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s Table 3. Electrical Characteristics Symbol Parameter Conditions Min Typ Max Units Thermal Protection Thermal Shutdown Threshold 140 °C Thermal Shutdown Hysteresis 30 °C Te ch ni ca am lc s on A te G nt st il lv al id 1. Depending on external components an extended Supply Voltage Range up to 40V is possible. 2. Guaranteed by design and characterisation. Depending on external components an extended Output Voltage Range up to 200V is possible. 3. Depending on parameters of external transistor and max. allowed heat dissipation of the external transistor. www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 6 - 20 AS1390A, AS1390B Datasheet - O p e r a t i n g C h a r a c t e r i s t i c s 7 Operating Characteristics VOUT Boost = 60V, IOUT Boost = 1A, VOUT Buck = 5V, IOUT Buck = 50mA, TA = +25°C (unless otherwise specified); 100 90 90 80 80 70 60 50 40 30 70 60 50 40 lv Output Voltage (V) 100 al id Figure 5. Boost - Output Voltage vs. Output Current; VIN = 12V 30 20 20 10 10 am lc s on A te G nt st il Efficiency (%) Figure 4. Boost - Efficiency vs. Output Current; VIN = 12V 0 0 0.1 1 10 0 0.25 0.5 Output Current (A) Figure 6. Boost - Efficiency vs. Output Current; VIN = 24V 100 1.25 1.5 1.75 2 28 30 Figure 7. Boost - Efficiency vs. Input Voltage 95 80 90 70 Efficiency (%) Efficiency (%) 1 100 90 60 50 40 30 20 85 80 75 70 65 60 10 55 0 50 1 10 ca 0.1 10 12 14 16 Output Current (A) 22 24 26 80 75 ch 75 20 Figure 9. Boost - VOUT vs. Temp.; VIN = 24V, IOUT = 200mA ni 80 18 Input Voltage (V) Figure 8. Boost - Output Voltage vs. Output Current; VIN = 24V Output Voltage (V) 70 65 Te Output Voltage (V) 0.75 Output Current (A) 60 55 50 45 70 65 60 55 50 45 40 40 0 0.5 1 1.5 2 2.5 3 3.5 4 Output Current (A) www.austriamicrosystems.com/Power-Management/AS1390 -30 -15 0 15 30 45 60 75 90 Temperature (ΣC) Revision 1.04 7 - 20 AS1390A, AS1390B Datasheet - O p e r a t i n g C h a r a c t e r i s t i c s Figure 10. Buck - Efficiency vs. Output Current; VIN = 12V Figure 11. Buck - Output Voltage vs. Output Current; VIN = 12V 100 7 95 6.5 85 80 75 70 65 6 5.5 5 al id Output Voltage (V) Efficiency (%) 90 4.5 4 60 50 3 10 0 100 10 20 30 Figure 12. Buck - Efficiency vs. Output Current; VIN = 24V 95 60 70 80 90 100 Figure 13. Buck - Output Voltage vs. Output Current; VIN = 24V 6.5 Output Voltage (V) 90 Efficiency (%) 50 7 100 85 80 75 70 65 60 6 5.5 5 4.5 4 3.5 55 50 3 10 0 100 10 20 30 Figure 14. Buck - Efficiency vs. Input Voltage 95 60 70 80 90 100 7 6.5 Output Voltage (V) ch 90 50 Figure 15. Buck - VOUT vs. Temp.; VIN = 24V ni 100 40 Output Current (mA) ca Output Current (mA) 85 80 75 Te Efficiency (%) 40 Output Current (mA) am lc s on A te G nt st il Output Current (mA) lv 3.5 55 70 65 6 5.5 5 4.5 4 60 3.5 55 50 3 12 14 16 18 20 22 24 Input Voltage (V) www.austriamicrosystems.com/Power-Management/AS1390 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Temperature (°C) Revision 1.04 8 - 20 AS1390A, AS1390B Datasheet - O p e r a t i n g C h a r a c t e r i s t i c s 50V/Div VIN 10V/Div al id VOUT 1ms/Div Te ch ni ca am lc s on A te G nt st il 2ms/Div lv 5A/Div EN 1V/Div 50V/Div 5A/Div IIN VIN VOUT VLOAD IIN 20V/Div Figure 17. Start with EN_BOOST pin 20V/Div Figure 16. Load Regulation www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 9 - 20 AS1390A, AS1390B Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1390 is a high efficiency, high voltage and high current DC-DC Step-up controller combined with an Step-down converter. The device is designed for LED backlight in LCD TV-sets. The special feature is the optimized operation point for the 2D and 3D mode. Hence the output voltage of the Step-up Converter can easily be switched via the MODE_3D pin from one voltage to the other. ca am lc s on A te G nt st il lv al id Figure 18. Detailed Block Diagram Boost Converter 8.1 Boost Controller 8.1.1 Setting output voltages ch ni The Output voltages of the AS1390 are defined by a voltage divider between the FB pin and Vout. Due to the capability of the AS1390 to switch between two output voltages, two dividers are necessary to adjust both output voltages. Output voltage for 2D-Mode: Te R FB1 V OUT – 2D = V FB × 1 + ------------------------------- R FB2 + R FB3 (EQ 1) Output voltage for 3D-Mode: R FB1 + R FB2 V OUT – 3D = V FB × 1 + ------------------------------- R FB3 (EQ 2) Where: VFB = 1.25V Note: The overall resistance should be in the range of 100k to 200kΩ to avoid any noise issues. www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 10 - 20 AS1390A, AS1390B Datasheet - D e t a i l e d D e s c r i p t i o n 8.1.2 Undervoltage-Lockout (UVLO) To enable the usage of the circuit with a wide input voltage range (typ. 12V and 24V), the threshold for undervoltage detection should be selectable by external components. Therefore a PAD UVLO is implemented, with an external resistor that selects the value of the threshold and implements also a hysteresis. Till UVLOCO gets deactivated, the threshold is higher, after UVLOCO is 0 (no undervoltage condition), the threshold is lowered by a switch-on of a constant current source. If the undervoltage-lockout is not needeed connect the UVLO pin to VDDL. am lc s on A te G nt st il lv al id Figure 19. UVLO - comparator and external resistor divider ca Figure 20. UVLO - comparator Output Following equations can be derived for adjusting the threshold voltages. ni Undervoltage threshold High: R UVLO1 V DDH – UVH = V REF × 1 + ------------------- R UVLO2 ch (EQ 3) Undervoltage threshold High: (EQ 4) Te R UVLO1 V DDH – UVL = V REF × 1 + ------------------- – ( IHYST × R UVLO1 ) R UVLO2 Where: IHYST = 20µA VREF = 1.35V www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 11 - 20 AS1390A, AS1390B Datasheet - D e t a i l e d D e s c r i p t i o n 8.1.3 Continuous Conduction Mode (CCM) For normal operation the converter should stay in continuous conduction mode, to ensure that the inductor value must be bigger than LCRIT. al id Where: VIN ... Input voltage at VDDH VOUT ... Output voltage VD ... Diode forward voltage at D1 fSW ... Switching frequency R ... Load resistor, should be calculated with minimum current load R = VOUT / IOUT_min Duty Cycle am lc s on A te G nt st il IOUT_min ... Minimum output current (e.g. for LED dirver only one LED string is on) 8.1.4 (EQ 5) lv L CRIT V IN 2 1 – -------------------------- × V IN × R V OUT + V D = --------------------------------------------------------------------2 2 × f SW × ( V OUT + V D ) Within CCM, the well known relation between input and output voltage is described in the following equation: this means for the duty cycle: 8.1.5 Inductor Current V OUT + V D 1 --------------------------- = ------------V IN 1–D (EQ 6) V IN D = 1 – --------------------------V OUT + V D (EQ 7) The inductor current varies during a switching cycle. This variation can be expressed by the mean value of the inductor current and the delta rise/ fall current within each cycle (see Figure 21). ch ni ca Figure 21. Inductor Current Te Mean inductor current: I OUT I L = ------------1–D (EQ 8) D × V IN ∆I L = ------------------fS × L (EQ 9) Delta inductor current: www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 12 - 20 AS1390A, AS1390B Datasheet - D e t a i l e d D e s c r i p t i o n Peak current: ∆I L IOUT D × VIN I pk = IL + -------- = ------------- + ----------------------2 1 – D 2 × fS × L (EQ 10) RMS inductor current: 2 IL + ( 1 ⁄ 12 × ∆I L ) 2 (EQ 11) al id I RMS = Note: The saturation current of the inductor should be about 20 to 30% larger than the peak current 8.1.6 Input Capacitor The input capacitor has to supply the delta inductor current and it should be selected according to: am lc s on A te G nt st il ∆I L C IN > -----------------------------------4 × ∆V IN × f SW ∆V IN ESR < ----------------2 × ∆I L 8.1.7 Output Capacitor lv This peak current is flowing through MN1 during phase 1 and through D1 during phase 2 of each cycle. Therefore this peak current is important for a proper diode D1, MOSFET MN1 and inductor L1 selection. (EQ 12) (EQ 13) The output capacitor must be chosen according to the max allowable output ripple at high load. I OUT – max × D C OUT > -----------------------------------∆V OUT × f SW 8.1.8 ca ∆V OUT ESR < ----------------------------------------------------IOUT V IN × D ------------ ------------------------- 1 – D + 2 × L × f SW (EQ 14) (EQ 15) Current Sense Resistor ch ni V SENSE R S – max = ----------------------------------I L + 0 , 5 × ∆I L P RS = I 2 L – rms (EQ 16) × RS × D (EQ 17) Note: Low inductance and specifically designed current sensing resistors should be used, e.g. Stackpole Electronics CSR/CSRN series of sensing resistors with less than 0.2nH (typ.). Compensation Network Te 8.1.9 For typical use cases a compensation network should be implemented by C10, C11 and R11 for 2D mode and optional by different component values C12, C13, R13 for 3D mode (see Figure 18 on page 10). A typical choice for values of the compensation network is C10 = 100pF, C11 = 10nF, R11 = 100KΩ. Use these values as initial choice and evaluate the transient response of the system to verify the behavior at output load change. To be able to do a different compensation for 3D mode, a second pin COMP_3D is available. If no separate compensation for 3D mode is necessary, PINs COMP_2D and COMP_3D can be connected to one common compensation network. www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 13 - 20 AS1390A, AS1390B Datasheet - D e t a i l e d D e s c r i p t i o n 8.2 Buck Converter The buck converter of the AS1390 is working with high-efficiency at a constant-frequency. The buck converter is optimized to supply a µC and with a fixed output voltage of 5V. The buck converter is working as soon as the AS1390 is powered-up but offers an automatic power save mode. The highly efficient duty cycle provides low dropout operation, which reduces the power consumption of the system. al id 8.3 Overvoltage Protection (OVP) An overvoltage condition is detected when the feedback voltage is higher than the skip threshold (1.28V typ.). The device is than entering the skip mode. Meaning the next pulse will be skipped and in the next cycle the overvoltage check is done again. lv 8.4 Overcurrent Protection (OCP) am lc s on A te G nt st il An overcurrent comparator is monitoring the output current via the sense pin. If an overcurrent condition occurs the transistor will be switched off immediately. After the overcurrent condition is removed the device is returning to normal operation again. 8.5 Overtemperature Protection (OTP) Te ch ni ca As soon as the junction temperature reaches approximately 140°C the AS1390 goes in thermal shutdown. In this mode the internal transistors are turned off. The device will power up again, as soon as the temperature falls below +110°C again. www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 14 - 20 AS1390A, AS1390B Datasheet - A p p l i c a t i o n I n f o r m a t i o n 9 Application Information 9.1 Typical Application ni ca am lc s on A te G nt st il lv al id Figure 22. Typical Application ch 9.2 Recommended external Components In order to reach the highest efficiency and best performance of the device we recommend to use the following external components. Te For the capacitors and resistors standard available components can be used. Depending on the desired voltage and the current special inductors and transistors should be used to guarantee pest performance for high current and high voltage operation. For the transistor we recommend the SIR432DP from Vishay Siliconix (www.vishay.com) for the Inductors see Table 4. Table 4. Recommended Inductors Part Number L DCR 74435573300 33µH 22mΩ 8.5A 18.3x18.2x8.9mm VLCF4020T-470MR39 47µH 849mΩ 0.39A 4.0x4.0x2.0mm www.austriamicrosystems.com/Power-Management/AS1390 Current Rating Dimensions (L/W/T) Revision 1.04 Manufacturer Würth Elektronik www.we-online.de TDK www.tdk.com 15 - 20 AS1390A, AS1390B Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 10 Package Drawings and Markings am lc s on A te G nt st il lv al id Figure 23. 20-Pin QFN (4x4mm) Marking Figure 24. 16-pin SOIC Marking Table 5. Packaging Code YYWWMZZ YY WW X ZZ manufacturing week plant identifier free choice / traceability code Te ch ni ca last two digits of the current year www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 16 - 20 AS1390A, AS1390B Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s Te ch ni ca am lc s on A te G nt st il lv al id Figure 25. 20-Pin QFN (4x4mm) Package www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 17 - 20 AS1390A, AS1390B Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s Te ch ni ca am lc s on A te G nt st il lv al id Figure 26. 16-pin SOIC Package www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 18 - 20 AS1390A, AS1390B Datasheet - O r d e r i n g I n f o r m a t i o n 11 Ordering Information The device is available as the standard products listed below. Table 6. Ordering Information AS1390A-BQFT AS1390A AS1390B-BSOT* AS1390B Description High Power Boost Controller and Buck Converter for LED Backlight High Power Boost Controller and Buck Converter for LED Backlight Delivery Form Package Tape and Reel 20-Pin QFN (4x4mm) Tape and Reel *) on request Note: All products are RoHS compliant and austriamicrosystems green. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect 16-pin SOIC am lc s on A te G nt st il Technical Support is found at http://www.austriamicrosystems.com/Technical-Support al id Marking lv Ordering Code Te ch ni ca For further information and requests, please contact us mailto:[email protected] or find your local distributor at http://www.austriamicrosystems.com/distributor www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 19 - 20 AS1390A, AS1390B Datasheet Copyrights Copyright © 1997-2012, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. al id Disclaimer lv Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. ni ca am lc s on A te G nt st il The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information ch Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Te Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/Power-Management/AS1390 Revision 1.04 20 - 20