NCP800 Product Preview Lithium Battery Protection Circuit for One Cell Battery Packs The NCP800 resides in a lithium battery pack where the battery cell continuously powers it. In order to maintain cell operation within specified limits, this protection circuit senses cell voltage, charge current, and discharge current, and correspondingly controls the state of two, N–channel, MOSFET switches. These switches reside in series with the negative terminal of the cell and the negative terminal of the battery pack. During a fault condition, the NCP800 open circuits the pack by turning off one of these MOSFET switches, which disconnects the current path. • • • • • • http://onsemi.com 3 4 5 MARKING DIAGRAM 2 1 6 TSOP–6 SN SUFFIX CASE 318G BAEyw y = Year w = Week Internally Trimmed Precision Charge and Discharge Voltage Limits Overvoltage Threshold Accuracy of ± 50 mV Discharge Current Limit Detection Automatic Reset from Discharge Current Faults Low Current Standby State when Cells are Discharged Available in a Low Profile Surface Mount Package PIN CONNECTIONS DO 1 6 Gnd P– 2 5 Vcell CO 3 4 Ct Typical One Cell Smart Battery Pack (Top View) ORDERING INFORMATION 5 Device Package Shipping NCP800SN1T1 TSOP–6 3000 Units/Rail NCP800 6 4 1 3 2 This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice. Semiconductor Components Industries, LLC, 2000 December, 2000 – Rev. 2 1 Publication Order Number: NCP800/D NCP800 Vcell Ct 5 4 VD1 Level Shift VD2 VD3 Standby/Reset VD1 10 kOhm Delay VD2 Short Circuit Detector VD3 Rshort 6 1 3 2 Gnd Do Co P– Figure 1. Detailed Block Diagram PIN FUNCTION DESCRIPTION ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Pin Symbol 1 DO This output connects to the gate of the discharge MOSFET allowing it to enable or disable battery pack. Description 2 P– This pin monitors cell discharge current. The excess current detector sets when the combined voltage drop of the charge MOSFET and the discharge MOSFET exceeds the discharge current limit threshold voltage, V(DET3). The short circuit detector activates when V(P–) is pulled within 0.8 V of the Vcell voltage. The Co driver is level shifted to the voltage at this pin. 3 CO This output connects to the gate of the charge MOSFET switch Q1 allowing it to enable or disable battery pack charging. 4 Ct This pin connects to the external capacitor for setting the output delay of the overvoltage detector (VD1). 5 Vcell This input connects to the positive terminal of the cell for voltage monitoring and provides operating bias for the integrated circuit. 6 Gnd This is the ground pin of the IC. http://onsemi.com 2 NCP800 MAXIMUM RATINGS ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ Ratings Symbol Value Unit Supply Voltage (Pin 5 to Pin 6) VDD –0.3 to 12 V Input Voltage Charge Gate Drive Common/Current Limit (Pin 5 to Pin 2) Overvoltage Delay Capacitor (Pin 4 to Pin 6) VP– VCt V(pin5) + 0.3 to V(pin 5) – 8 0.3 to 12 Output Voltage CO Pin Voltage (Pin 3 to Pin 2) DO Pin Voltage (Pin 1 to Pin 6) VCO VDO V(pin5) + 0.3 to V(pin 5) – 8 –0.3 to 12 V V Thermal Resistance, Junction–to–Air SN Suffix, TSOP–6 Plastic Package, Case 318G °C/W RθJA – Operating Junction Temperature TJ –40 to 85 °C Storage Temperature Tstg –55 to 125 °C NOTES: ESD data available upon request. ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.) Characteristic Symbol Min Typ Max Unit Overvoltage Threshold, VDD Increasing Overvoltage Hysteresis VDD Decreasing VDET1 VHYS1 4.30 150 4.35 – 4.40 250 V mV Overvoltage Delay Time t(DET1) – 55 – – – – – 105 – 2.437 – 2.563 VOLTAGE SENSING Ct = 510 pF Ct = 0.01 µF Ct = 0.047 µF Undervoltage Threshold, VDD Decreasing VDET2 ms V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Undervoltage Delay Time t(DET2) 7.0 – 13 ms VDET3 170 – 230 mV CURRENT SENSING Excess Current Threshold (Detect rising edge of P– pin voltage) Short Protection Voltage (VDD = 3.0 V) VSHORT – – VDD – 0.5 V Current Limit Delay Time (VDD = 3.0 V) t(DET1) t(SHORT) 9.0 – – 5 13 – ms µs RSHORT 50 – 150 k Charge Gate Drive Output Low (Pin 3 to Pin 2) (VDD = 4.4 V, Io = 50 µA) Vol1 – – 0.5 V Charge Gate Drive Output High (Pin 5 to Pin 3) (VDD = 3.9 V, Io = –50 µA) Voh1 3.4 – – V Discharge Gate Drive Output Low (Pin 1 to Pin 6) (VDD = 2.4 V, Io = 50 µA) Vol2 – – 0.5 V Discharge Gate Drive Output High (Pin 5 to Pin 1) (VDD = 3.9 V, Io = –50 µA) Voh2 3.4 – – V 3.0 0.3 – – 6.0 0.6 µs µs 1.5 – 12 V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Reset Resistance OUTPUTS ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ TOTAL DEVICE Supply Current Operating (VDD = 3.9 V, VP– = 0 V) Standby (VDD = 2.0 V) Icell Operating Voltage VDD http://onsemi.com 3 NCP800 PACKAGE DIMENSIONS (TSOP–6) SN SUFFIX CASE 318G–02 ISSUE G A NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. L 6 S 1 5 4 2 3 B D G M J C 0.05 (0.002) H K DIM A B C D G H J K L M S MILLIMETERS MIN MAX 2.90 3.10 1.30 1.70 0.90 1.10 0.25 0.50 0.85 1.05 0.013 0.100 0.10 0.26 0.20 0.60 1.25 1.55 0 10 2.50 3.00 INCHES MIN MAX 0.1142 0.1220 0.0512 0.0669 0.0354 0.0433 0.0098 0.0197 0.0335 0.0413 0.0005 0.0040 0.0040 0.0102 0.0079 0.0236 0.0493 0.0610 0 10 0.0985 0.1181 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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