UNISONIC TECHNOLOGIES CO., LTD UB244A Preliminary CMOS IC LI-ION BATTERY PROTECTION IC FOR 1-CELL TO 4-CELL PACK (SECONDARY PROTECTION) DESCRIPTION The UTC UB244A Series is secondary protection IC for 1-, 2-, 3-, or 4-Cell lithium-ion rechargeable battery packs, and incorporates a high-accuracy voltage detection circuit. The UTC UB244A Series also includes a high accuracy delay circuit for over voltage detection time can be set by an external capacitor. FEATURES * High-accuracy voltage detection circuit for each cell * Overcharge detection voltage n (n=1 to 4): 4.05V to 4.50V (in 50mV steps) * Overcharge hysteresis voltage n (n=1 to 4): 0.38V±0.10V, 0.25V±0.07V, 0.13V±0.04V, 0.045V±0.02V, None * Delay times for overcharge detection can be set by an external capacitor * CMOS output active “H” * Wide operating voltage range 3.6V to 24V * Wide operating temperature range −40°C to +85°C * Low current consumption: 1.5μA typ. (+25°C) at 3.5V for each cell ORDERING INFORMATION Ordering Number Lead Free Halogen Free UB244AL-xx-SM1-R UB244AG-xx-SM1-R Note: xx: Output Voltage, refer to Marking Information. UB244AG-xx-SM1-R Package Packing MSOP-8 Tape Reel (1)Packing Type (1) R: Tape Reel (2)Package Type (2) SM1: MSOP-8 (3)Output Voltage Code (3) xx: Refer to Marking Information (4)Halogen Free (4) G: Halogen Free, L: Lead Free www.unisonic.com.tw Copyright © 2012 Unisonic Technologies Co., Ltd 1 of 11 QW-R502-857.a UB244A Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 PIN NAME VCC SENSE 3 VC1 4 VC2 5 VC3 6 VSS 7 8 ICT CO CMOS IC DESCRIPTION Positive power input pin Positive voltage connection pin of battery 1 Negative voltage connection pin of battery 1 Positive voltage connection pin of battery 2 Negative voltage connection pin of battery 2 Positive voltage connection pin of battery 3 Negative voltage connection pin of battery 3 Positive voltage connection pin of battery 4 Negative power input pin Negative voltage connection pin of battery 4 Capacitor connection pin for overcharge detection delay FET gate connection pin for charge SERIAL CODE LIST MODEL UB244A CODE OVERCHARGE DETECTION VOLTAGE [VCU](V) OVERCHARGE HYSTERSIS VOLTAGE [VCD](V) OUTPUT FORM AA 4.450±0.050 0.380±0.10 CMOS output active “H” AB 4.115±0.050 0.130±0.04 CMOS output active “H” AC 4.350±0.050 0.045±0.02 CMOS output active “H” AD 4.450±0.050 0.045±0.02 CMOS output active “H” AE 4.300±0.050 0.250±0.07 CMOS output active “H” AF 4.400±0.050 0.045±0.02 CMOS output active “H” AG 4.500±0.050 0.380±0.10 CMOS output active “H” AH 4.475±0.050 0.380±0.10 CMOS output active “H” AI 4.350±0.050 0.250±0.07 CMOS output active “H” AJ 4.150±0.050 0.250±0.07 CMOS output active “H” AK 4.250±0.050 0.250±0.07 CMOS output active “H” AL 4.050±0.050 0.250±0.07 CMOS output active “H” UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 11 QW-R502-857.a UB244A Preliminary CMOS IC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 11 QW-R502-857.a UB244A Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (TA= 25°C unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Input Voltage Between VCC And VSS VDS VSS−0.3 ~ VSS+26 V Input Pin Voltage (SENSE/VC1/VC2/VC3) VIN VSS−0.3 ~ VCC+0.3 V CO Output Pin Voltage VCO VSS−0.3 ~ VCC+0.3 V Power Dissipation (Note 2) PD 500 mW Operation Ambient Temperature TOPR −40 ~ +85 °C Storage Temperature TSTG −40 ~ +125 °C Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. When mounted on printed circuit board. ELECTRICAL CHARACTERISTICS (TA=25°C unless otherwise specified) PARAMETER DETECTION VOLTAGE Overcharge Detection Voltage n (n = 1, 2, 3, 4) Overcharge Hysteresis Voltage n (n = 1, 2, 3, 4) (Note 1) DELAY TIME Overcharge Detection Delay Time OPERATING VOLTAGE Operating Voltage Between VCC And VSS (Note 2) CURRENT CONSUMPTION Current Consumption During Operation Current Consumption At Power Down VC1 Pin Current VC2 Pin Current VC3 Pin Current OUTPUT VOLTAGE SYMBOL VCUn TEST CONDITIONS 4.05V ~ 4.50V Adjustment VCDn tCU C=0.1μF VDSOP MIN TYP MAX UNIT VCUn − 0.050 VCUn VCUn + 0.050 V 0.28 0.38 0.48 V 1.0 1.5 2.0 S 24 V 3.6 IOPE V1=V2=V3=V4=3.5V 1.5 6.0 μA IPDN IVC1 IVC2 IVC3 V1=V2=V3=V4=2.3V V1=V2=V3=V4=3.5V V1=V2=V3=V4=3.5V V1=V2=V3=V4=3.5V 1.2 0 0 0 6.0 0.5 0.5 0.5 μA μA μA μA CO “H” VOLTAGE VCO(H) IOUT = -10μA CO “L” VOLTAGE VCO(L) IOUT = 10μA -0.5 -0.5 -0.5 VCC -0.05 V VSS +0.05 V Notes: 1. 0.25±0.07V, 0.13±0.04V, 0.045±0.02V except for 0.38V hysteresis models. 2. After detecting the overcharge, the delay circuit operates normally in the range of operating voltage. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 11 QW-R502-857.a UB244A Preliminary CMOS IC OPERATING 1. Overcharge Detection CO is turned to “H” (for CMOS output active “H”) when the voltage of one of the batteries exceeds the overcharge detection voltage (VCU) during charging under normal conditions beyond the overcharge detection delay time (tCU). This state is called “overcharge.” Attaching FET to the CO pin provides charge control and a second protection. At that time, the overcharge state is maintained until the voltage of all batteries decreases from the overcharge detection voltage (VCU) by the equivalent to the overcharge hysteresis voltage (VCD). 2. Delay Circuit The overcharge detection delay time (tCU) change with an external capacitor (CICT). The delay times are calculated by the following equations： Overcharge detection delay time tCU[s] = (15±5 )×CICT [μF] TIMING CHARTS V1 Battery VCU V2 Battery V3 Battery V4 Battery VCD Battery voltage VSS VCC CO pin voltage CMOS output active “H” and Nch open drain models VSS VCC VDET ICT pin voltage VSS tCU UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 11 QW-R502-857.a UB244A Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT (1) Connection Example 1 (for 4-cells) SC PROTECTOR EB+ RVCC SENSE BAT1 BAT2 R1 R2 CVCC C1 VC1 C2 UTC UB244A VC2 BAT3 R3 VCC ICT CICT C3 VC3 BAT4 R4 FET C4 VSS CO DP EB- Constants for External Components 1 SYMBOL R1 to R4 MIN 0 TYP 1k MAX 10 k UNIT Ω C1 to C4 0 0.1 1 μF RVCC 0 100 1k Ω CVCC 0 0.1 1 μF CICT 0 0.1 1 μF Notes: 1. The above constants may be changed without notice. 2. It has not been confirmed whether the operation is normal or not in circuits other than the above example of connection. In addition, the example of connection shown above and the constant do not guarantee proper operation. Perform through evaluation using the actual application to set the constant. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 11 QW-R502-857.a UB244A Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT(Cont.) (2) Connection Example 2 (for 4-cells) EB+ RVCC SENSE BAT1 BAT2 R1 R2 CVCC C1 VC1 UTC UB244A C2 VC2 BAT3 R3 VCC ICT CICT C3 VC3 BAT4 R4 FET C4 VSS CO DP EB- SC PROTECTOR Constants for External Components 2 SYMBOL R1 to R4 MIN 0 TYP 1K MAX 10 k UNIT Ω C1 to C4 0 0.1 1 μF RVCC 0 100 1k Ω CVCC 0 0.1 1 μF CICT 0 0.1 1 μF Notes: 1. The above constants may be changed without notice. 2. It has not been confirmed whether the operation is normal or not in circuits other than the above example of connection. In addition, the example of connection shown above and the constant do not guarantee proper operation. Perform through evaluation using the actual application to set the constant. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 11 QW-R502-857.a UB244A Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT(Cont.) (3) Connection Example 3 (for 3-cells) SC PROTECTOR EB+ RVCC SENSE BAT1 BAT2 R1 R2 CVCC C1 VC1 C2 UTC UB244A VC2 BAT3 R3 VCC ICT CICT C3 VC3 VSS FET CO DP EB- Constants for External Components 3 SYMBOL R1 to R3 MIN 0 TYP 1k MAX 10 k UNIT Ω C1 to C3 0 0.1 1 μF RVCC 0 100 1k Ω CVCC 0 0.1 1 μF CICT 0 0.1 1 μF Notes: 1. The above constants may be changed without notice. 2. It has not been confirmed whether the operation is normal or not in circuits other than the above example of connection. In addition, the example of connection shown above and the constant do not guarantee proper operation. Perform through evaluation using the actual application to set the constant. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 11 QW-R502-857.a UB244A Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT(Cont.) (4) Connection Example 4 (for 2-cells) SC PROTECTOR EB+ RVCC SENSE BAT1 BAT2 R1 R2 VCC CVCC C1 VC1 C2 UTC UB244A VC2 ICT CICT VC3 VSS FET CO DP EB- Constants for External Components 4 SYMBOL MIN TYP MAX UNIT R1 to R2 0 1k 10 k Ω C1 to C2 0 0.1 1 μF RVCC 0 100 1k Ω CVCC 0 0.1 1 μF CICT 0 0.1 1 μF Notes: 1. The above constants may be changed without notice. 2. It has not been confirmed whether the operation is normal or not in circuits other than the above example of connection. In addition, the example of connection shown above and the constant do not guarantee proper operation. Perform through evaluation using the actual application to set the constant. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 11 QW-R502-857.a UB244A Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT(Cont.) (5) Connection Example 5 (for 1-cell) SC PROTECTOR EB+ RVCC SENSE BAT1 R1 VCC CVCC C1 VC1 UTC UB244A VC2 ICT CICT VC3 VSS FET CO DP EB- Constants for External Components 5 SYMBOL R1 MIN 0 TYP 1k MAX 10 k UNIT Ω C1 0 0.1 1 μF RVCC 0 100 1k Ω CVCC 0 0.1 1 μF CICT 0 0.1 1 μF Notes: 1. The above constants may be changed without notice. 2. It has not been confirmed whether the operation is normal or not in circuits other than the above example of connection. In addition, the example of connection shown above and the constant do not guarantee proper operation. Perform through evaluation using the actual application to set the constant. PRECAUTIONS 1. DO NOT connect any of overcharged batteries. Even if only one overcharged battery is connected to this IC, the IC detects overcharge, then charge current flows to the delay capacitor through the parasitic diode between pins where the battery is not connected yet. This may lead to a malfunction. Please perform sufficient evaluation in the case of use. Depending on an application circuit, even when the fault charge battery is not contained, the connection turn of a battery may be restricted in order to prevent the output of CO detection pulse at the time of battery connection. Any position from V1 to V4 can be used when applying this IC for a one to three-cell battery. However, be sure to short circuit between pins not in use (SENSE-VC1, VC1-VC2, VC2-VC3, or VC3-VSS). The application conditions for the input voltage, output voltage, and load current should not exceed the package power dissipation. Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. 2. 3. 4. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 11 QW-R502-857.a UB244A Preliminary CMOS IC UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 of 11 QW-R502-857.a