Charge Control DATA SHEET KA35S280;KA35S281 Lead-Acid Battery Charger Product Specification Kasin Corporation 2011 Nov 18 KA35S280/281 Lead-Acid Battery Charger Features: Optimum Control for Maximum Battery Capacity and Life Applicable to Various Types of Lead Battery Pin-Selectable Charge Algorithms (3 Step Voltage, Current, or Pulsed Charge) Automatically Shorted, Opened, or Damaged Cells Detections Automatically Battery Removal Detection Charge Condition LED Indicator Outputs (On, Pulsed, Off) Automatic Correction of Charging Current and Voltage Based on Current Temperature Maximum and Minimum Battery Temperature Protection Pre-Charge Qualification (Initial Trickle Charge for Deeply Discharged Batteries) Cycle/Float Button (For In-System Battery Charge Condition) Adjustable Charging Time Control by Changing the External Current Resistor Faster Charge Time Button Externally Disabling Charge Button Switch Mode Constant Current Generation Pb-Free (RoHS Compliant) Applications: Handheld Equipment Portable Instruments and Communications Power Conditioning for Battery Systems Telecommunications Power Utility Emergency Lighting Control System Fire & Security Renewables UPS Description: The KA35S28X series of battery charger controllers contain all of the necessary circuitry to optimally control the charge and hold cycle for sealed lead-acid batteries. These integrated circuits monitor and control both the output voltage and current of the charger through three separate charge states; a high current bulk-charge state, a controlled over-charge, and a precision float-charge, or standby, state. The Pulse-Width Modulator (PWM) provides control for high-efficiency current and voltage regulation. It allows the KA35S28X to control 3-step constant-voltage, constant current, or pulsed-current charging. A charge cycle begins when power is applied or the battery is replaced. For safety, charging is inhibited until the battery voltage is within configured limits. If the battery voltage is less than the low-voltage threshold, the KA35S28X provides tricklecurrent charging until the voltage rises into the allowed range. This procedure prevents highcurrent charging of cells that are possibly damaged or reversed. Charging is inhibited anytime if the temperature of the battery is outside the configurable, allowed range. All voltage thresholds, in accordance with battery manufacturer's recommendations, are change proportional to the temperature conditions. KA35S28X can receive the types of charging algorithm or stop charging commands from its mode selection pins. Also it can change the voltage thresholds when battery is connected to an electronic circuit or raises charge speed by 25% only by individual pins that named as "cycle/float" and "faster charge". 2011 Nov 18 © 2011 Kasin Technology Inc. 2 KA35S280/281 Lead-Acid Battery Charger Ordering information: Table 1. Ordering information Type Number KA35S280-DN KA35S280-DI KA35S280-SN KA35S280-SI KA35S281-DN KA35S281-DI KA35S281-SN KA35S281-SI Temperature Range -20°C to +85°C -40°C to +125°C -20°C to +85°C -40°C to +125°C -20°C to +85°C -40°C to +125°C -20°C to +85°C -40°C to +125°C Pins 14 14 14 14 14 14 14 14 Package Package DIP14 DIP14 SO14 SO14 DIP14 DIP14 SO14 SO14 Material Plastic Plastic Plastic Plastic Plastic Plastic Plastic Plastic Code SOT27-1 SOT27-1 SOT108-1 SOT108-1 SOT27-1 SOT27-1 SOT108-1 SOT108-1 Pinning information - Pining KA35S28X 1 2 3 4 5 6 7 VDD VSS SW VBAT MS0 I SNS MS1 LED0 Faster LED1 Cyclic/Float LED2 TEMP LED3 14 13 12 11 10 9 8 Figure 1 - Pin configuration - Pin description Table 2 – pin Description Symbol VDD SW MS0 MS1 Faster Cyclic / TEMP LED3 LED2 LED1 LED0 ISNS VBAT VSS Float Pin 1 2 3 4 5 Description 5.0V±10% power PWM Control Output Mode Select 0 Mode Select 1 25% Faster Charging 6 7 8 9 10 11 12 13 14 Select Between Cyclic and Float Applications Temperature Sense Input Charge status output 3 Charge status output 2 Charge status output 1 Charge status output 0 Current Sense Input Battery Voltage Sense Input System Ground 2011 Nov 18 © 2011 Kasin Technology Inc. 3 KA35S280/281 Lead-Acid Battery Charger Functional diagram: KA35S28X Block Diagram + TEMP V LTF - V HTF + I Max + SW Reset MS0 1 + But. Press En 5mV MS1 Phase Controller Unit +- 2 3 Source Select: 0- Current Comp. - A 10 + 1- Voltage B Cyc/Flt 4 4 A>B 5 LED0 1 Counter 7 ADC Up CNT VFLT 1 0 Down 4 50mV MUX +- Clk Osc. VMax 0 LED2 VBLK MUX 6Hz LED1 VMin Ref. Gen. Comp. A 90 B LED3 4 A>B A=B VDD 4 3 Temp. compensation - 0 50mV MUX VSS 3 V FLT 1V Min 1 1 2 2 VMax 3 Faster Charge VDD 2 I Th MUX 0 VDD I Max - 0 1 +- I Min I Cond + + 5 I SNS MUX V BLK Temp. compensation VBAT Figure 2 – KA35S28X Block Diagram Functional description: The KA35S28X functional operation is described in terms of: Pin configuration o Mode selection pins o Faster Charge pin o Cyclic/Float use pin Fixed and Configurable Thresholds Charge algorithms o 3-Step voltage charge o Current charge o Pulsed-current charge Temperature monitoring o Temperature compensation o Disabling Temperature Sensing Charge monitoring Fault detection o Battery insertion and removal o Shorted, opened, or damaged cells detections 2011 Nov 18 © 2011 Kasin Technology Inc. 4 KA35S280/281 Lead-Acid Battery Charger - Pin Configuration - Mode selection pins The KA35S28X can be programmed into 3 different charge algorithm named as 3-step voltage, current and pulsed current by mode selection pins. Table 3 shows the relations between MS0/MS1 selection pins and IC operation. Table 3 – Mode Selection pins MS1 MS0 Mode Description 0 0 1 1 0 1 0 1 0 1 2 3 Charge is disabled 3-step voltage charge Current charge Pulsed current Charge - Faster charge pin The faster charge pin can be change internal DC voltage threshold of max current by 25% (50mV). In normal condition it is configured to 200mV by internal voltage reference generator unit. Table 4 – Mode Selection pins Faster Pin Description 0 1 Charge current increased by 25% Normal current charge - Cyclic/Float use pin Due to recent design breakthroughs, the same battery may be used in either cyclic or standby applications and it is necessary to set the charge voltage according to it. Inaccurate voltage settings cause over- or under-charge. In applications where standby power is required to operate when the power has been interrupted, continuous float charging is recommended. Non-continuous cyclic charging is used primarily with portable equipment where charging on an intermittent basis is appropriate. The cyclic/float pin can be change internal charge reference voltage and method of temperature compensation. Table 5 – Mode Selection pins Cyclic/Float Pin 0 1 Description In cyclic use In float use - Fixed and Configurable Thresholds The KA35S28X uses the following fixed thresholds: VMAX High-Cutoff Voltage: VBAT rising above this level is interpreted as battery removal, cutting off charging current. VMAX = 0.6 * VCC. VMIN Low-Cutoff Voltage: VBAT dropping below this level is interpreted as battery removal, cutting off charging current. VMIN = 0.2 * VCC. VTH Minimum Voltage: Used in pre-charge qualification. V TH = 0.34 * VCC. ICOND Conditioning Current: Used in the maintenance phase of the Current algorithm and pre-charge qualification. ICOND = IMAX/5. IMAX is set by Equation 2. Also the KA35S28X uses the following configurable thresholds: VBLK Upper voltage limit during fast charge, typically specified by the battery manufacturers to be 2.3V in float and 2.45 in cyclic applications per cell @ 25°C. KA35S28X uses 2.45V for VBLK when Cyclic/Float pin is set 0. VFLT Minimum charge voltage required to compensate for the battery’s self-discharge rate and maintain full charge on the battery. 2011 Nov 18 © 2011 Kasin Technology Inc. 5 KA35S280/281 Lead-Acid Battery Charger Fast charge current specified as a function of “C,” the capacity of the battery in Ampere-hours (e.g., a charge rate of 1C for a 5Ah battery is 5A). Typical values range from C/10 to C, although some battery vendors may approve higher charge rates. IMAX The KA35S28X monitors battery pack voltage at the VBAT pin. A voltage divider between the positive and negative terminals of the battery pack is used to present a scaled battery pack voltage to the VBAT pin. The KA35S28X also uses the voltage across a sense resistor (RSNS) between the negative terminal of the battery pack and ground to monitor current. See Figure 3 and below equations for the configuration of this network. Equation 1: And IMAX is determined by: Equation 2: Where: N = Number of series cells in the battery pack IMAX = Desired maximum charge current BAT+ V BAT RB 1 RB 2 I BAT BAT- R SNS KA35S28X Figure 3 - Configuring the Battery Divider The KA35S28X internal band-gap reference voltage at 25°C is 2.2V. This reference shifts with temperature at -3.9mV/°C to compensate for the negative temperature coefficient of lead-acid chemistry. The total resistance presented by the divider between BAT+ and BAT- (RB1 + RB2) should be between 100KΩ and 1MΩ. The minimum value ensures that the divider network does not drain the battery excessively when the power source is disconnected. Exceeding the maximum value increases the noise susceptibility of the VBAT pin. 1% resistors are recommended. Table 6 shows the several examples of resistor selections. Table 6 – RB1, RB2 Values by Number of Cells and RSNS by Desired IMAX N RB1 (KΩ) RB2 (KΩ) IMAX RSNS (Ω) 3 (6V) 6 (12V) 12 (24V) 57KΩ 147KΩ 327KΩ 33KΩ 33KΩ 33KΩ 0.5 1A 1.5A 0.4Ω 0.2Ω 0.13Ω 2011 Nov 18 © 2011 Kasin Technology Inc. 6 KA35S280/281 Lead-Acid Battery Charger - Charge algorithms - 3-Step voltage charge VBLK Voltage VFLT Fast Charge Maintenance VTH Phase 2 Phase 3 I COND Phase 4 Voltage Current I MAX Qualification This algorithm consists of four phases (figure 4): 1. Phase1 - Qualification: The charging current is limited at ICOND (=IMAX/5) until the cell voltage rises to V TH to prevent battery damage. In this condition The KA35S28X enters the Charge Pending state and waits until the battery voltage rises to V TH. Charge Pending is annunciated by LED0 and LED3 flashing. 2. Phase2 - Fast Charge 1: The charging current is limited at IMAX (1.25 IMAX when faster pin is 0) until the cell voltage rises to VBLK. 3. Phase3 - Fast Charge 2: The charging voltage is regulated at VBLK until the charging current drops below IMIN ( 0.1IMAX) 4. Phase4 - Maintenance: The charging voltage is regulated at VFLT. Current Phase 1 I MIN I FLT Time Figure 4 – 3-Step Voltage Charge - Current charge VBLK Current VFLT Voltage Phase 2 VTH Maintenance Fast Charge I COND Phase 3 Phase 1 Voltage Current I MAX Qualification This algorithm consists of three phases (figure 5): 1. Phase1 - Qualification: The charging current is limited at ICOND (=IMAX/5) until the cell voltage rises to V TH to prevent battery damage. In this condition The KA35S28X enters the Charge Pending state and waits until the battery voltage rises to V TH. Charge Pending is annunciated by LED0 and LED3 flashing. 2. Phase 2 - Fast Charge: The charging current is regulated at IMAX (1.25 IMAX when faster pin is 0) until the cell voltage rises to VBLK or the “Second Difference” of cell voltage drops below -8mV while VBAT is over 2.0V. 3. Phase3 - Maintenance: Fixed-width pulses of charging current = ICOND are modulated in frequency to achieve an average value of IMIN (0.1IMAX). I MIN I FLT Time Figure 5 – Current Charge 2011 Nov 18 © 2011 Kasin Technology Inc. 7 KA35S280/281 Lead-Acid Battery Charger - Pulsed-current charge This algorithm consists of three phases (figure 6): 1. Phase1 - Qualification: The charging current is limited at ICOND (=IMAX/5) until the cell voltage rises to V TH to prevent battery damage. In this condition The KA35S28X enters the Charge Pending state and waits until the battery voltage rises to V TH. Charge Pending is annunciated by LED0 and LED3 flashing. 2. Phase2 - Fast Charge: The charging current is regulated at IMAX (1.25 IMAX when faster pin is 0) until the cell voltage rises to VBLK. 3. Phase3 - Maintenance: Charging current is removed until the battery voltage falls to VFLT; charging current is then restored and regulated at IMAX (1.25 IMAX when faster pin is 0) until the battery voltage once again rises to VBLK. This cycle is repeated indefinitely. Maintenance VBLK Current VFLT Voltage Phase 2 Fast Charge I COND Phase 1 VTH Voltage Current I MAX Qualification Phase 3 I MIN I FLT Time Figure 6 – Fast Charge - Temperature monitoring - Temperature compensation The KA35S28X senses temperature by monitoring the voltage of TEMP pin. The KA35S28X assumes a Negative Temperature Coefficient (NTC) thermistor, so the voltage on the TEMP pin is inversely proportional to the temperature (see Figure 7). The temperature thresholds used by the KA35S28X and their corresponding TEMP pin voltage are: TCO Temperature Cut-Off: Higher limit of the temperature range in which charging is allowed. VTCO = 0.12 * VCC. HTF High-Temperature Fault: Threshold to which temperature must drop after Temperature Cut-Off is exceeded before charging can begin again. VHTF = 0.15 * VCC LTF Low-Temperature Fault: Lower limit of the temperature range in which charging is allowed. VLTF = 0.35 * VCC. A resistor-divider network must be implemented that presents the defined voltage levels to the TEMP pin at the desired temperatures (see Figure 8). The equations for determining RT1 and RT2 are: Equation 1: Equation 2: Where: RLTF = Thermistor resistance at LTF RHTF = Thermistor resistance at HTF 1% resistors are recommended. As an example, the resistor values for several temperature windows computed for a 3KΩ thermistor are shown in Table 7. 2011 Nov 18 © 2011 Kasin Technology Inc. 8 KA35S280/281 Lead-Acid Battery Charger Table 7 – RT1 and RT2 Values for Temperature Thresholds LTF (°C) HTF (°C) RT1 RT2 5 °C 0 °C -5 °C 45 °C 50 °C 55 °C 8.18KΩ 7.50KΩ 6.85KΩ 15.22KΩ 11.25KΩ 8.72KΩ . Colder VLTF = 0.35VCC LTF VHTF = 0.15VCC HTF VTCO = 0.12VCC TCO VSS Temperature Voltage VCC Hotter Figure 7 – Voltage Equivalent of Temperature Threshold VCC RT1 TEMP NTC Thermistor RT2 KA35S28X Figure 8 – Configuring Temperature Sensing - Disabling Temperature Sensing Temperature sensing may be disabled by removing the thermistor and use a single Pull up or Pull down resistor connected to TEMP pin as shown in figure 9. VCC TEMP Or RPU TEMP RPD KA35S28X KA35S28X Figure 9 – Disabling Temperature Sensing where: RPU = Pull up resistor (Can be select 1KΩ) RPD = Pull down resistor (Can be select 1KΩ) 2011 Nov 18 © 2011 Kasin Technology Inc. 9 KA35S280/281 Lead-Acid Battery Charger - Charge monitoring Charge status (figure 10) is annunciated by the LED driver outputs LED1 - LED3 (figure 11) 2.6 Voltage Profile for Lead-Acid Charging with Constant Current Regulation 2.5 Voltage per Cell, V 2.4 2.3 2.2 2.1 Charge Rate = C/20 2.0 1.9 0 25 50 75 100 125 150 Previous Discharge Capacity Returned, % Figure 10 - Voltage Roll-Off In Constant Current Charging Profile R LED0 LED0 R LED1 LED1 R LED2 LED2 R LED3 LED3 KA35S28X Figure 11 – LED Display - Fault detection - Battery insertion and removal The KA35S28X uses VBAT to detect the presence or absence of a battery. The KA35S28X determines that a battery is present when VBAT is between the High-Voltage Cutoff and the Low-Voltage Cutoff. When VBAT is outside this range, the KA35S28X determines that no battery is present and transitions to the Fault state. Also, sudden changes in battery voltage can cause the fault state. - Shorted, opened, or damaged cells detections The KA35S28X can be detect shorted, opened, and damaged cells by using one of the following below state: 1. High current detection 2. Non-rechargeable batteries detection 3. Changing in any of the buttons 2011 Nov 18 © 2011 Kasin Technology Inc. 10 KA35S280/281 Lead-Acid Battery Charger Typical Application Switch Network 3300uF (50V) 1N4007 (1A) 7805 + BAT+ 1 15 (7) - 30 V 2 3 4 5 6 7 VDD VSS SW VBAT MS0 I BAT MS1 LED0 Faster LED1 Cyclic/Float LED2 TEMP LED3 14 RB 1 13 12 (6) V 12 RB 2 11 BAT- 10 9 1N4007 (1A) 8 R SNS KA35S28X N RB1 (KΩ) RB2 (KΩ) IMAX RSNS (Ω) 3 (6V) 6 (12V) 12 (24V) 57KΩ 147KΩ 327KΩ 33KΩ 33KΩ 33KΩ 100mA 300mA 500mA 2Ω 0.66Ω 0.4Ω Figure 12 – A Very Simple High Power 3-Step Voltage Lead-Acid Battery Charger 2011 Nov 18 © 2011 Kasin Technology Inc. 11 KA35S280/281 Lead-Acid Battery Charger Typical Application 33KΩ IRF9530 3300uF (50V) 1N4007 (1A) 7805 + BAT+ 15 (7) - 30 V 22KΩ 1 1KΩ 2 3 4 5 6 7 VDD VSS SW VBAT MS0 I BAT MS1 LED0 Faster LED1 Cyclic/Float LED2 TEMP LED3 14 RB 1 13 12 (6) V 12 RB 2 11 BAT- 10 9 1N4007 (1A) R 8 SNS KA35S28X N RB1 (KΩ) RB2 (KΩ) IMAX RSNS (Ω) 3 (6V) 6 (12V) 12 (24V) 57KΩ 147KΩ 327KΩ 33KΩ 33KΩ 33KΩ 100mA 300mA 500mA 2Ω 0.66Ω 0.4Ω Figure 13 – Schematic Diagram of A Very Simple High Power 3-Step Voltage Lead-Acid Battery Charger 2011 Nov 18 © 2011 Kasin Technology Inc. 12 KA35S280/281 Lead-Acid Battery Charger Typical Application 39 mm 57 mm Figure 14 – Schematic Diagram and PCB Layout of a Very Simple 3-Step Voltage of LeadAcid Battery Charger 2011 Nov 18 © 2011 Kasin Technology Inc. 13 KA35S280/281 Lead-Acid Battery Charger Typical Application 51 mm 80 mm Figure 15 – Schematic Diagram and PCB Layout of Lead-Acid Battery Charger with Programmable Charge Algorithm, Faster and Cyclic Charge Buttons, LED Display, Selectable DC or AC Power Input and Temperature Sensor 2011 Nov 18 © 2011 Kasin Technology Inc. 14 KA35S280/281 Lead-Acid Battery Charger Absolute Maximum Ratings: Table 8 – Absolute Maximum Ratings Symbol Parameter VDD VCC relative to VSS DC voltage applied on any pin VT excluding VDD relative to VSS TOPR Operating ambient temperature TSTG Storage temperature TSOLDER Soldering temperature *- In KA35S28X-XI series. Min. Max. Unit -0.3 6.5 V -0.3 6.5 * -20 (-40 ) -55 --- Note V * +85 (+125 ) +125 (+150*) +260 °C °C °C 10 s. max. DC Thresholds: Table 9 – Absolute Maximum Ratings Symbol Parameter VLTF VHTF VTCO VMAX VMIN VTH Internal reference voltage Temperature coefficient TEMP maximum threshold TEMP hysteresis threshold TEMP minimum threshold High cutoff voltage Under-voltage threshold at BAT Low cutoff voltage VSNS Current sense at SNS VREF Rating Unit Tolerance Note 2.00 -3.9 0.35*VDD 0.15*VDD 0.12*VDD 0.6*VDD 0.2*VDD 0.34*VDD 0.200 0.040 V mV/°C V V V V V V V V 1% 10% ±0.02V ±0.02V ±0.02V ±0.02V ±0.02V ±0.02V 10% 10% TA=25°C IMAX ICond Recommended operating conditions: Table 10 – Absolute Maximum Ratings Symbol Parameter VDD Supply voltage TEMP voltage potential Battery voltage potential Supply current Logic input high Logic input low LEDX output high LEDX output low LEDX output source LEDX output sink logic input low source logic input high source VTEMP VBAT ICC VIH VIL VOH VOL IOH IOL IIL IIH Min. KA35S28X-XN Typ. Max. Min. KA35S28X-XI Typ. Max. Unit 4.5 5.0 5.5 4.5 5.0 5.5 V 0 - VDD 0 - VDD V 0 - VDD 0 - VDD V VDD-0.6 VDD-0.7 -15 15 - 3 - 5 VSS+0.3 VSS+0.5 35 VDD-0.6 VDD-0.7 -15 15 - 3 - 5 VSS+0.3 VSS+0.5 35 V V V V V mA mA µA - - -40 - - -40 µA 2011 Nov 18 © 2011 Kasin Technology Inc. 15 KA35S280/281 Lead-Acid Battery Charger Package outline: DIP16: plastic dual in-line package; 16 leads (300 mil) SOT27-1 Seating plane D ME A2 A A1 L c w e Z M b1 (e 1 ) b 14 MH 8 Pin 1 index E 1 7 0 10 mm 5 Scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) Unit A max. A1 min A2 max. mm 4.2 0.51 3.2 inches 0.17 0.02 0.13 b b1 c D(1) E(1) 1.73 1.13 0.068 0.044 0.53 0.38 0.21 0.015 0.36 0.23 0.014 0.009 19.50 18.55 0.77 0.73 6.48 6.20 0.26 0.24 e e1 2.54 7.62 0.1 0.3 L ME MH 3.60 3.05 0.14 0.12 8.25 7.80 0.32 0.31 10.0 8.3 0.39 0.33 w Z(1) max. 0.254 2.2 0.01 0.087 Note 1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. Figure 16 - Package outline SOT27-1 2011 Nov 18 © 2011 Kasin Technology Inc. 16 KA35S280/281 Lead-Acid Battery Charger SO14: plastic small outline package; 14 leads; body width 3.9 mm SOT108-1 D A E X c y HE v M A Z 8 14 Q A2 A (A3 ) A1 Pin 1 index θ Lp L 7 1 e w bp 0 Detail X M 5 mm 2.5 scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) Unit A max. mm 1.75 inches 0.069 A1 A2 0.25 0.10 0.010 0.004 1.45 1.25 0.057 0.049 A3 0.25 0.01 bp c D(1) E(1) 0.49 0.36 0.019 0.014 0.25 0.19 0.010 0.007 8.75 8.55 0.35 0.34 4.0 3.8 0.16 0.15 e 1.27 0.05 HE 6.2 5.8 0.244 0.228 L 1.05 0.041 Lp Q 1.0 0.4 0.039 0.016 0.7 0.6 0.028 0.024 v w y 0.25 0.25 0.1 0.01 0.01 0.004 Z(1) max. 0.7 0.3 0.028 0.012 Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. Figure 17 - Package outline SOT108-1 2011 Nov 18 © 2011 Kasin Technology Inc. 17 θ 8° 0° KA35S280/281 Lead-Acid Battery Charger DATA SHEET STATUS LEVEL DATA SHEET STATUS(1) PRODUCT STATUS(2)(3) І Objective data Development ІІ Preliminary data Qualification ІІІ Product data Production DEFINITION This data sheet contains data from the objective specification for product development. Kasin Corporation reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification Supplementary data will be published at a later date. Kasin Corporation reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. Kasin Corporation reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Notes 1. Please consult the most recently issued data sheet before initiating or completing a design. 2. The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.kasincorp.com. 3. For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. DEFINITIONS Short-form specification - The data in a short-form specification is extracted from a full datasheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition - Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information - Applications that are described herein for any of these products are for illustrative purposes only. Kasin Corporation make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. DISCLAIMERS Life support applications - These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Kasin Corporation customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Kasin Corporation for any damages resulting from such application. Right to make changes - Kasin Corporation reserves the right to make changes in the products including circuits, standard cells, and/or software described or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Kasin Corporation assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. 2011 Nov 18 © 2011 Kasin Technology Inc. 18 KA35S280/281 Lead-Acid Battery Charger Notes: Contact information: For additional information please visit: http://www.kasincorp.com. For sales offices addresses send e-mail to: [email protected]. © Kasin Corporation Electronics N.V. 2011 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. 2011 Nov 18 © 2011 Kasin Technology Inc. 19