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RT9541 Dataheets PDF



Part Number RT9541
Manufacturers Richtek Technology
Logo Richtek Technology
Description Li-Ion Battery Protector
Datasheet RT9541 DatasheetRT9541 Datasheet (PDF)

Preliminary RT9541 Li-Ion Battery Protector General Description The RT9541 Series are protection ICs for overcharge/discharge of rechargeable one-cell Lithium-ion (Li+) batteries by CMOS process. The RT9541 Series can detect over-charge/discharge of Li+ one-cell and excess load current and charge current, further include a short circuit protector for preventing large external short circuit current. Each of these ICs is composed of four voltage detectors, a reference unit, a hysteresis circu.

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Preliminary RT9541 Li-Ion Battery Protector General Description The RT9541 Series are protection ICs for overcharge/discharge of rechargeable one-cell Lithium-ion (Li+) batteries by CMOS process. The RT9541 Series can detect over-charge/discharge of Li+ one-cell and excess load current and charge current, further include a short circuit protector for preventing large external short circuit current. Each of these ICs is composed of four voltage detectors, a reference unit, a hysteresis circuit, and a bidirectional short circuit protector. Package of SOT26 is available. Ordering Information RT9541… … … … Package type E : SOT-26 Type I ER : SOT-26 Type II Operating temperature range C: Commercial standard See Table 1 Typical Application Circuit R1 100Ω + C1 0.1µF CT C3 0.01µF VSS VDD RT9541 V- DOUT COUT C2 0.1µF R2 1KΩ Features z Low supply current − Supply current: TYP. 2.0µA − Standby current (after detecting overdischarge): Less than 0.2µA z High accuracy detector threshold − Over-charge detector: ±25mV − Over-discharge detector: ±2.5% z Built-in protection circuit − Excess current trip/Short circuit protector in both charging and discharging direction z Output delay of over-charge adjustable with an external capacitor: 75mS at 0.01µF z Ultra small package: SOT26 Applications z Over-charge / Over-discharge Protection for Li+ One-cell Pack z High Precision Protectors for Cellular Phones or Instruments Using Li+ One-cell Battery Pin Configurations Part Number RT9541…CE (Plastic SOT-26) Pin Configurations TOP VIEW 65 4 123 1. COUT 2. CT 3. VSS 4. DOUT 5. VDD 6. V- RT9541…CER (Plastic SOT-26) 65 4 123 TOP VIEW 1. DOUT 2. V3. COUT 4. CT 5. VDD 6. VSS DS9541-05 August 2001 www.richtek-ic.com.tw 1 RT9541 Absolute Maximum Ratings z Allowable Battery Voltage z Input Voltage (V) z Input Voltage (CT) z Output Voltage (COUT) z Output Voltage (DOUT) z Power Dissipation, PD @ TA = 25°C SOT-26 z Package Thermal Resistance SOT-26, θJA z Operating Temperature Range z Storage Temperature Range Preliminary -0.3V ~ 7V VDD-14V to VDD +0.3V VSS-0.3V to VDD +0.3V VDD-14V to VDD +0.3V VSS-0.3V to VDD +0.3V 0.25W 250°C/W -20°C ~ +85°C -65°C ~ +150°C Electrical Characteristics Parameter Symbol Test Conditions Min Typ Max Units Operating Input Voltage VDD Charger Voltage VCHG Minimum Operating Voltage for 0V Charging Voltage defined as VDD-VSS Voltage defined as VDD-V- Voltage defined as VDD-VVDD-VSS = 0V 1 -- -- -- 6 V -- 14 V -- 1 V Accuracy of Over-charge Threshold Voltage ∆VOCHG Detect rising edge of supply voltage -25 -- 25 mV Over-charge Threshold Hysteresis 0.1 0.15 0.2 V Output Delay Time of Over-charge TOCHG C3 = 0.01µF, VDD = 3.6V ~ 4.3V 30 60 80 mS Accuracy of Over-discharge Threshold Voltage ∆VODISCHG Detect falling edge of supply voltage -2.5 -- 2.5 % Output Delay Time of Overdischarge TODISCHG VDD = 3.6V ~ 2.4V 10 15 20 mS Excess Current Threshold Voltage During Discharge Detect rising edge of “V-“ pin voltage 0.15 0.17 0.19 V Output Delay of Discharge Excess Current VDD = 3.0V 15 20 25 mS Excess Current Threshold Voltage During Charge Detect falling edge of “V-“ pin voltage -0.19 -0.17 -0.15 V Output Delay of Charge Excess Current 15 20 25 mS Short Detection Voltage During Discharge VDD = 3.0V VDD-1.1 VDD-0.8 VDD-0.5 V Output Delay of Discharge Short Circuit TSHORT VDD = 3.0V -- 5 50 µS Reset Resistance for Excess Current Protection RSHORT VDD = 3.6V, V- = 1.0V 25 50 75 kΩ Supply Current Standby Current IDD ISTANDBY VDD = 3.9V, V- = 0V VDD = 2.0V -- 2.0 5.0 µA -- 0.1 0.5 µA www.richtek-ic.com.tw 2 DS9541-05 August 2001 Preliminary RT9541 Table 1 Part Number RT9541ACE (R) RT9541BCE (R) RT9541CCE (R) RT9541DCE (R) RT9541ECE (R) RT9541FCE (R) RT9541GCE (R) RT9541HCE (R) RT9541ICE (R) RT9541JCE (R) Over Over Excess Charge Discharge Current 4.25V 2.3V 170mV 4.25V 2.4V 170mV 4.25V 2.5V 170mV 4.25V 2.6V 170mV 4.25V 2.7V 170mV 4.25V 2.8V 170mV 4.30V 2.3V 170mV 4.30V 2.4V 170mV 4.30V 2.5V 170mV 4.30V 2.6V 170mV Function Block Diagram VDD CT Part Number RT9541KCE (R) RT9541LCE (R) RT9541MCE (R) RT9541NCE (R) RT9541OCE (R) RT9541PCE (R) RT9541QCE (R) RT9541RCE (R) RT9541SCE (R) RT9541TCE (R) Over Over Excess Charge Discharge Current 4.30V 2.7V 170mV 4.30V 2.8V 170mV 4.35V 2.3V 170mV 4.35V 2.4V 170mV 4.35V 2.5V 170mV 4.35V 2.6V 170mV 4.35V 2.7V 170mV 4.35V 2.8V 170mV 4.35V 2.9V 170mV 4.25V 2.9V 170mV _ _ + + VD1 _ VD4 VD2 _ VD3 ++ Level Shift Delay Short Circuit Detector Pin Description VSS Pin Number Pin Name RT9541-…CE RT9541-…CER 1 3 COUT 2 4 CT 3 6 VSS 4 1 DOUT 5 5 VDD 6 2 V- DOUT COUT V- Pin Function Output of Over-charge Detection, CMOS Output Pin for External Capacitor Setting Output Delay of VD1 Ground Output of Over-discharge Detection, CMOS Output Power Supply, through a Resistor (R1) Pin for Charger Negative Input, through a Resistor (R2).


CS213 RT9541 CD7388CZ


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