GS7001B-84

Shouding GS7001B-84 Advanced Linear Charge Management Controller Features Preset 8.4V (TYP.) Charge Voltage with 1% Accuracy The  Programmable Charge Current Up to 0.9A  Absolute Maximum Input Voltage: 30V  Wide Input Operation Voltage: 9V ～ 13.5V  Pre-Charging, the Charge Current is adjustable GS7001B complete is a highly advanced constant-current/ constant voltage linear charger for cell lithium-ion batteries. Its package and low external component count make the GS7001B ideally suited for Ideal for Dual-Cell (8.4V)Li-Ion Batteries  Constant -Current Charging, the Charge Current is adjustable G portable applications. The charge current can be  programmed externally with a single resistor, which may be programmed up to 0.9A. determines the charge mode by GS7001B detecting the battery voltage: Pre-charge,  Constant-Voltage Charging  Constant-Current/Constant-Voltage constant current charging, constant voltage charging. The charge current of 0pre-charging D Charging with Temperature Monitoring  Automatic Recharge  Double LEDs Charge Status Indication  Available in SOP-8L Package U and constant–current charging is adjustable. The O Applications Description IN  is monitored by temperature GS7001B monitor during the constant-current and constant-voltage charging. There are two LEDs indicate the charge mode. Charger for Li-Ion Coin Cell Batteries  Bluetooth Applications  Portable MP3 Players, Wireless Headsets SH  The GS7001B is available in the SOP-8L package. Ordering Information Device GS7001B www.sdw-tw.com Package Options 8-Lead SOIC GS7001B-84 Ver1.0,Oct.2020 1 Shouding GS7001B-84 Typical Application Circuit DC+ RSET LED1 8 LED2 VIN C1 20µF 1 R2 2k CHRG1 R1 2k 6 CS 5 PDRI PMOS GS7001B 7 CHRG2 2 TS RTS 10k GND Schottky Diode VOUT 4 VOUT C2 20µF G 3 *The charge current IO(REG) =VCS/RSET (VCS is usually 200mV). Note that OFF indicates the LED is turned off. LED1 LED2 Flash Flash ON OFF Charge Complete(Done) OFF ON OVP OFF OFF D Condition IN *The reverse-blocking protection diode is optional. In addition, the reverse-leakage current of the diode should be kept as small as possible. U No-Load(Note 1) SH O Battery Charging Table1. Charge Status Summary Note1: See right figure for the VCHRG waveform. www.sdw-tw.com Ver1.0,Oct.2020 2 Shouding GS7001B-84 Pin Assignment and Description 8 1 7 2 6 3 5 4 SOP-8L PIN NAME DESCRIPTION 1 CHRG1 Open-Drain Charge Status Output 2 TS Temperature Sense 3 GND Ground 4 VOUT 5 PDRI Charge Current Output Charge Current Monitor and Shutdown Pin 6 CS Charge Current Program 7 CHRG2 Open-Drain Charge Status Output 8 VIN Positive Input Supply Voltage. G TOP VIEW IN Absolute Maximum Ratings (Note 2) Input Supply Voltage (VIN) ..................................................................................... -0.3V ～ 30V  CS Pin........................................................................................................... -0.3V ～ VIN + 0.3V  VOUT Pin Current.................................................................................................................. 0.9A  PD................................................................................................................................. ................2W  Maximum Junction Temperature ....................................................................................... +150℃  Operating Ambient Temperature Range (Note 3).................................................-40℃ ～ +85℃  Storage Temperature Range ……………………………………………................-65℃ ～ +125℃  Lead Temperature (Soldering, 10 sec)................................................................................+265℃ O U D  SH Note 2: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. Note 3: The GS7001B is guaranteed to meet performance specifications from 0℃ to 70℃. Specifications over the –40℃ to 85℃ operating temperature range are assured by design, characterization and correlation with statistical process controls. www.sdw-tw.com Ver1.0,Oct.2020 3 Shouding GS7001B-84 Electrical Characteristics Operating Conditions: TA = 25℃, R1=R2=4.7k, RTS=10k, RSET =0.5Ω unless otherwise specified. SYMBOL VIN PARAMETER CONDITIONS MIN Input Operation 9 Voltage OVLO Threshold VIN(OVLO) 13.5 V 0.4 V 4 mA VIN=12V, R1=R2=0 400 μA Sleep Current Sum of currents into VOUT pin, VIN=0 25 μA Minimum Voltage difference Threshold VIN-VBAT 600 mV OVLO Hysteresis Input Supply Current G ΔVVIN-VBAT UNITS V IN ISLEEP MAX 14.2 VIN Rising, VBAT=8V Standby Mode( No-Load ) IQ TYP Battery Voltage Regulation Constant-current Charge V（CS） BAT Pin Current VBAT=8.4V Current Regulation Threshold Voltage at pin CS , relative to VIN Trickle Charge ΔVTRIKL 8.3 8.4 8.48 μA 10 180 200 V 220 mV VBAT < VTRIKL, RSET =0.5Ω. 6.3 V VBAT Rising, RSET =0.5Ω. 60 mA 100 mV 80 mV 3 mA VTS from Low to High 2.4 V VTS from High to Low 0.5 V -80 μA 150 ℃ O ITRIKL Trickle Charge Threshold Voltage Trickle Charge Current SH VTRIKL D IBAT Output Voltage U VO(REG) Trickle Charge Voltage hysteresis Battery Recharge ΔV（RCH） Recharge Battery Voltage hysteresis VFLOAT - VRECHRG CHRG Pin ICHRG CHRG Bias Current Temperature Sense Comparator VTS-COLD VTS- HOT ITS TS Pin Threshold Voltage (Cold) TS Pin Threshold Voltage (Hot) TS Pin Output Current Thermal Protection TSD Thermal Shutdown www.sdw-tw.com Temperature Rising Ver1.0,Oct.2020 4 Shouding GS7001B-84 Pin Functions CHRG1 (Pin 1): Charge Status Indication. When the battery is charging, the CHRG pin is pulled low. When the charge cycle is completed, the CHRG pin is pulled high. This PIN is available through a 2kohm resistor and indicates that the light-emitting diode connected. TS (Pin 2): Temperature Sense. GND (Pin 3): Ground. VOUT (Pin 4): Charge Current Output. It should be bypassed with at least a 20μF capacitor. It provides charge current to the battery and regulates the final float voltage to 8.4V. PDRI (Pin 5): Driving side. Connect to the grid of the PMOS. programmed by connecting a resistor, RSET, ISET = V（CS）/RSET. G CS (Pin 6): Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is CHRG2 (Pin 7): End-of-Charge Status Indication. When the battery is charging, the CHRG2 pin is IN forced high. When the charge cycle is completed, CHRG2 is pulled low. VIN (Pin 8): Positive Input Supply Voltage. It Provides power to the charger VIN and should be SH O U D bypassed with a 20μF capacitor. www.sdw-tw.com Ver1.0,Oct.2020 5 Shouding GS7001B-84 Application Information Functional Description The GS7001B is an advanced 0.9A linear charge controller for dual-cell Li-Ion of Li-lon SH O U D IN G applications. Refer to Block Diagram and Operation Flow Chart (Figure 1) in this section. Figure 1: Operation Flow Chart www.sdw-tw.com Ver1.0,Oct.2020 6 Shouding GS7001B-84 Qualification and Precharge When power is applied, the GS7001B starts a charge-cycle if a battery is already present or when a battery is inserted. Charge qualification is based on battery temperature and voltage. The GS7001B suspends charge if the battery temperature is outside the VTS1 to VTS2 range and suspends charge until the battery temperature is within the allowed range. The GS7001B also checks the battery voltage. If the battery voltage is below the pre-charge threshold V(min), the uses pre-charge to condition the battery. The conditioning charge rate I(PRECHG) is set at GS7001B approximately 15% of the regulation current. The conditioning current also minimizes heat dissipation in SH O U D IN G the external pass-element during the initial stage of charge. See Figure 2 for a typical charge-profile. Figure 2: Typical Charge Profile Current Regulation Phase The GS7001B VO(REG). The regulates current while the battery-pack voltage is less than the regulation voltage, GS7001B monitors charge current at the CS input by the voltage drop across a sense-resistor, RSET, in series with the battery pack. In current sensing configuration, RSET is between the VIN and CS pins, charge-current feedback, applied through pin CS, maintains a voltage of VCS across the current sense resistor. The following formula calculates the value of the Sense resistor: Where, IO(REG) is the desired charging current. Voltage Phase The voltage regulation feedback is through the BAT pin. This input is tied directly to the positive side of the battery pack. The pins. The GS7001B-84 www.sdw-tw.com GS7001B monitors the battery-pack voltage between the BAT and GND is offered 8.4V output voltage. Ver1.0,Oct.2020 7 Shouding GS7001B-84 Charge Termination Recharge The GS7001B monitors the charging current during the voltage-regulation phase. The GS7001B declares a done condition and terminates charge when the current drops to the charge termination threshold, ITERM. A new charge cycle begins when the battery voltage falls below the VRCH threshold. Battery Temperature Monitoring A negative temperature coefficient (NTC) thermistor located close to the battery pack can be used to monitor battery temperature and will not allow charging unless the battery temperature is within an acceptable range. Connect a 10k thermistor from the TS pin to ground. With the 80µA pull-up current source, the hot G temperature voltage threshold is 0.5V. For cold temperature, the voltage threshold is set at 2.4V with 80µA of pull-up current. The charge cycle begins or resumes once the temperature is within the IN acceptable range. Reverse Blocking Protection D The optional reverse-blocking protection diode, depicted in Figure1 provides protection from a faulted or shorted input, or from a reversed-polarity input source. Without the protection diode, a faulted of shorted input would discharge the battery pack through the body diode of the external pass transistor. U If a reverse-protection diode is incorporated in the design, it should be chosen to handle the fast charge current continuously at the maximum ambient temperature. In addition, the reverse-leakage current of SH Selecting Input Capacitor O the diode should be kept as small as possible. In most applications, all that is high-frequency decoupling capacitor. The GS7001B works with both regulated an unregulated external dc supplies. If a non-regulated supply is chosen, the supply voltage to the minimum required input voltage at maximum load. If not, more capacitance must be added to the input of the charger. Selecting Output Capacitor The GS7001B does not require any output capacitor for loop stability. In order to maintain good AC stability in constant Voltage mode, a minimum capacitance of 20uF is recommenced to bypass the BAT pin to GND. This capacitance provides compensation when there is no battery load. In addition, the battery and interconnections appear inductive at high frequencies. These elements are in the control feedback loop during Constant Voltage mode. Therefore, the bypass capacitance may be necessary to compensate for the inductive nature of the battery pack. Virtually any good quality output filter capacitor can be used, independent of the capacitor’s minimum ESR (Effective Series Resistance) value. The actual value of the capacitor and its associated ESR depends on the forward transconductance (gm) and capacitance of the external pass transistor. A 20uF tantalum or aluminum electrolytic capacitor at the output is usually sufficient to ensure stability for up to a 0.9A output current. www.sdw-tw.com Ver1.0,Oct.2020 8 Shouding GS7001B-84 PCB Application Suggestions IN G The temperature characteristic on the sample PCB (Figure3) is showed as follow. SH O U D Figure3: Temperature characteristic on the sample PCB www.sdw-tw.com Ver1.0,Oct.2020 9 Shouding GS7001B-84 Packaging Information SH O U D IN G SOP-8L Package Outline Dimension Symbol A Dimensions In Millimeters Min Max Dimensions In Inches Min Max 1.350 1.750 0.053 0.069 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 D 4.700 5.100 0.185 0.200 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 A1 e 1.270(BSC) 0.050(BSC) L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° www.sdw-tw.com Ver1.0,Oct.2020 10