R5492N

R5492N NISSHINBO | Alldatasheet

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Technical content

1-Cell Li-ion Battery Protection IC NO.EA-421-250606 OUTLINE The R5492N is a high voltage tolerance protection IC for overcharge, overdischarge, and overcurrent of a rechargeable one-cell Lithium-ion (Li+) / Lithium -polymer battery. The R549 2N supports the voltage release type at overcharging / overdischarging. Each output delay time of overcharge, overdischarge, and overcurrent is fixed internally. But, the delay shortening is able to shorten the detection and the release delay times at overcharging / overdischarging. Especially, the overcharge detection delay time can be shorten to aprrox.1/90.

FEATURES

 Hi gh Voltage Tolerant Process  Low Supply Current  High-accuracy Voltage Detection Discharge Overcurrent Detection Voltage ················ 0.05 V to 0.20 V (in 5 mV steps) Discharge Overcurrent Detection Voltage Accuracy ··· ± 15 mV Charge Overcurrent Detection Voltage Accuracy ······ ±15 mV  0V Battery Charge Function

APPLICATIONS

 Li+ / Li Polymer protection of overcharge, overdischarge, and overcurrent for Battery pack  High precision protection for smart-phones and any other gadgets using on board Li+ / Li Polymer battery

NO.EA-421-250606 SELECTION GUIDE The set output voltages of overcharge, overdischarge, and discharge overcurrent are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R5492Nxxx∗$-TR-FF SOT-23-6 3,000 pcs Yes Yes xxx: Specify the combination of each detection voltage (VDET) and each release voltage (VREL). Refer to Product Code Table for details. Ov ercharge Detection Voltage (VDET1) : 4.00 V to 4.50 V (in 5 mV steps) Ov erdischarge Detection Voltage (VDET2): 2.00 V to 3.00 V (in 0.1 V steps) Discharge Overcurrent Detection Voltage (VDET3): 0.05 V to 0.20 V (in 5 mV steps) Charge Overcurrent Detection Voltage (VDET4): -0.05 V to -0.20 V (in 5 mV steps) Ov ercharge Release Voltage (VREL1): VDET1 - 0 V to VDET1 - 0.3 V Ov erdischarge Release Voltage (VREL2): VDET2 + 0 V to VDET2 + 0.9 V, in the range between 2.5 V and 3.4 V ∗: Specify the combination of each delay time parameter. Refer to Delay Time Code Table for details. Delay Time Code Table Code tVDET1(s) tVDET2 (ms) tVDET3 (ms) tVDET4(ms) tSHORT(µs) K 1.0 20 12 8 300 $: Specify the function code. Function Code Table Code Overcharge Overdischarge L Voltage Release Type

NO.EA-421-250606 Product Code Table The product code is determined by the combination of the set output voltage (overcharge detection / release voltage: VDET1 / VREL1, overdischarge detection / release voltage: VDET2 / VREL2, discharge / charge overcurrent detection voltage: VDET3 / VDET4) and the delay time (overcharge / overdischarge detection delay time: tVDET1 / tVDET2, discharge / charge overcurrent detection delay time: tVDET3 / tVDET4) and the function code. Product Code & Set Voltages Table Product Code Set Output Voltage (V) DelayTime VDET1 VREL1 VDET2 VREL2 VDET3 VDET4 tVDET1 tVDET2 tVDET3 tVDET4 tSHORT (V) (V) (V) (V) (V) (V) (s) (ms) (ms) (ms) (µs)

NO.EA-421-250606 BLOCK DIAGRAM Short Detector DOUT COUT V- Oscillator VD1 VD2 Level Shift VD3 Counter Logic Circuit Delay Logic Circuit VDD VSS DS Circuit VD4 R5492N Block Diagram PIN DESCRIPTION 6 4 1 2 3 mark side R5492N (SOT-23-6) Pin Configuration R5492N Pin Description Pin No. Symbol Description

1 DOUT Overdischarge detection voltage pin, CMOS output

2 V- Negative power supply voltage pin

3 COUT Overcharge detection voltage pin, CMOS output

4 NC No Connection

5 VDD Power supply voltage pin, the substrate potential of the IC.

6 VSS Ground pin

NO.EA-421-250606 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings (Ta = 25°C, VSS = 0 V) Symbol Item Rating Unit VDD Power supply voltage 0.3 to 12 V V- V- pin voltage VDD-30 to VDD+0.3 V VCOUT COUT pin voltage VDD-30 to VDD+0.3 V VDOUT DOUT pin voltage VSS-0.3 to VDD+0.3 V PD Power Dissipation(1) (Standard Test Land Pattern) 150 mW Tj Junction Temperature Range -40 to 125 °C Tstg Storage Temperature Range -55 to 125 °C ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause permanent damage and may degrade the lifetime and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITION Symbol Item Rating Unit VDD1 Operating Input Voltage 1.5 to 5.0 V Ta Operating Temperature Range −40 to 85 °C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. (1) Refer to POWER DISSIPATION in SUPPLEMENTSRY ITEMS for detail information.

NO.EA-421-250606

ELECTRICAL CHARACTERISTICS

R5492NxxxKL Eectronical Characteristics (Ta = 25°C) Symbol Parameter Conditions Min. Typ. Max. Unit Circuit (1) VST Minimum operating voltage for 0V charging Voltage between VDD and V- pins, VDD – VSS = 0V

1.8 V A

VDET1 Overcharge detection voltage R1 = 330Ω V B Ta = 25°C VDET1 -0.020 VDET1 VDET1 +0.020 Ta = -5°C to 55°C VDET1 -0.025 VDET1 VDET1 +0.025 VREL1 Overcharge release voltage R1 = 330Ω VREL1 -0.050 VREL1 VREL1 +0.050 V B tVDET1 Overcharge detection delay tVREL1 Overcharge release delay time VDD = 4.5V → 3.6V 11 16 21 ms C VDET2 Overdischarge detection voltage Falling edge of supply voltage VDET2 ×0.975 VDET2 VDET2 ×1.025 V D VREL2 Overdischarge release voltage Rising edge of supply voltage VREL2 ×0.975 VREL2 VREL2 ×1.025 V M tVDET2 Overdischarge detection delay time VDD = 3.6V → 2.2V 14 20 26 ms D tVREL2 Overdischarge release delay time VDET3 Charge overcurrent detection voltage Rising edge of V- pin voltage VDET3 -0.015 VDET3 VDET3 +0.015 V F tVDET3 Discharge overcurrent detection delay time VDD=3.0V, V- = 0V → 0.5V 8 12 16 ms F tVREL3 Discharge overcurrent release delay time VDD= 3.0V, V-= 3V → 0V 0.7 1.2 1.7 ms F VSHORT Short-circuit detection voltage VDD = 3.0V 0.55 0.80 1.00 V F tSHORT Short-circuit detection delay time VDD = 3.0V, V- = 0V → 3V 230 300 500 µs F RSHORT Discharge overcurrent release resistance VDD = 3.6V, V- = 1.0V 5 15 25 kΩ F (1) Refer to TEST CIRCUITS for details.

NO.EA-421-250606 R5492NxxxKL Eectronical Characteristics (Continued) (Ta = 25°C) Symbol Parameter Conditions Min. Typ. Max. Unit Circuit (1) VDET4 Charge overcurrent detection voltage Falling edge of V- pin voltage VDET4 -0.015 VDET4 VDET4 +0.015 V G tVDET4 Charge overcurrent detection delay time VDD= 3.0V, V- = 0V → -1V 5 8 11 ms G tVREL4 Charge overcurrent release delay time VDD= 3.0V, V- = -1V → 0V 0.7 1.2 1.7 ms G VDS Short-circuit mode voltage VDD = 4.4V -3.15 -2.55 -1.95 V G VOL1 COUT Nch.ON voltage IOL = 50µA, VDD = 4.5V 0.4 0.5 V H VOH1 COUT Pch.ON voltage IOH = -50µA, VDD = 3.9V 3.4 3.7 V I VOL2 DOUT Nch.ON voltage IOL = 50µA, VDD = 2.0V 0.2 0.5 V J VOH2 DOUT Pch.ON voltage IOH = -50µA, VDD = 3.9V 3.4 3.7 V K IDD Supply current VDD = 3.9V, V- = 0V 4.0 8.0 µA L ISTANDBY Standby current VDD = 1.8V 0.5 µA L (1) Refer to TEST CIRCUITS for details.

NO.EA-421-250606 Test Circuits A OSCILLOSCOP VDD DOUT COUT VSS V V B V VDD VSS COUT C VDD VSS COUT D V VDD VSS DOUT E VDD VSS DOUT F V A VDD VSS DOUT H V A VDD VSS COUT G V VDD VSS COUT I V A VDD VSS COUT J V A VDD VSS DOUT

NO.EA-421-250606 K V A VDD VSS DOUT L A VDD VSS M V VDD VSS DOUT

NO.EA-421-250606 THEORY OF OPERATION Overcharge Detector (VD1) The VD1 monitors V DD pin voltage during charge. When the V DD voltage crosses overcharge detector threshold VDET1, the VD1 can sense overcharge and the output of C OUT pin becomes “L” and stop charging by turning off the external Nch. MOSFET. After detecting overcharge, when the voltage of V DD pin is equal or less than the released voltage from over - charge, or when the V DD voltage is less than the overcharge detector threshold, if the charger is removed, VD1 is released, then the output level of COUT becomes “H” and by turning on the external Nch. MOSFET, the battery charger is ready to work again. However, depending on the characteristics of external components such as MOSFETs, release conditions may be not enough and a kind of load must be set to release the over- charge. When the Input level of V DD pin is equal or more than overcharge detector threshold, and while a charger is disconnected from the battery pack, if a load system is connected to the battery pack, the output level of C OUT pin is “L” . However, load current can be flowed through a parasitic diode of an external Nch. MOSFET. Then, when the voltage level of V DD pin becomes lower than overcharge detector threshold, the output level of COUT pin becomes “H”. Output delay time for overcharge detect and released overcharge is internally fixed respectively. Although the VDD voltage goes up to a higher level than overcharge detector threshold within the output delay time, VD1 would not work for detecting overcharge. If the action for VD1 to release is done and the condition returns to the initial one within the output delay time, VD1 cannot be released. A level shifter is built in a buffer driver for the C OUT pin, therefore, the “L” level is equal to the voltage level of V- pin. The output type of COUT pin is CMOS type. The Output level is between VDD and V-. Charge Overcurrent Detector (VD4) While charge and discharge are acceptable with the battery pack, VD4 senses V- pin voltage. For example, if the battery pack is charged by an inappropriate charger, overcurrent flows, then the voltage of V- pin becomes less than charge overcurrent detector threshold. Then, the output of C OUT becomes “L”, and protects against flowing overcurrent in the circuit by turning off the external Nch. MOSFET. Output delay of charge overcurrent is internally fixed. Even the voltage level of V - pin becomes lower than charge overcurrent detector threshold, if the voltage is higher than the VD4 threshold within the delay time, charge overcurrent state is not detected. Output delay time for release from charge overcurrent is also set internally. VD4 can be released by disconnecting a charger.

NO.EA-421-250606 Timing Chart of Overcharging V DET1 V REL1 VDD COUT V DD V DD V DET3 V SS V DET4 tVDET1 Connect Charger Open tVREL1 tVDET1 Connect Charger Connect Load tVREL1 Charge Over- Current Connect Load tVDET4 tVREL4 t t t t Charge/ Discharge Current Charge Current Discharge Current

NO.EA-421-250606 Overdischarge Detector (VD2) The VD2 monitors a V DD pin voltage during discharge. When the V DD voltage crosses the overdischarge detector threshold V DET2 from a high level to a lower level than V DET2, the VD2 senses overdischarge and stop discharge by turning off an external Nch. MOSFET. To reset the VD2 with the DOUT pin level being “H” again after detecting overdischarge, if VDD voltage is equal or less than overcharge detector threshold, a charge current flows through a parasitic diode of the external Nch. MOSFET. After that, when V DD voltage is more than overdischarge threshold, D OUT pin becomes "H", and by tuning on the external Nch. MOSFET, discharge is possible. In the case that a charger is connected to the battery pack, and V DD level is more than overdischarge detector threshold, the output level of D OUT becomes “H” immediately. Without connecting a charger, if VDD pin voltage is equal or more than the released voltage from overdischarge, the output level of DOUT becomes “H”. When a cell voltage is equal to 0V, connecting a charger to the battery pack makes COUT pin become "H" and the system is allowable for charge while the voltage of the charger is more than the maximum limit of the minimum operating voltage (Vst) for 0V charge. An output delay for overdischarge detection is fixed internally . Although the voltage of VDD becomes equal or less than overdischarge detector threshold and if it becomes higher than overdischarge detector threshold within output delay time, overdischarge detector does not work. Output delay time for release from over- discharge is also set internally. After detecting overdischarge by VD2, supply current would decrease, because unnecessary circuits are halted and being standby. The output type of DOUT pin is CMOS type and its output level is in between VDD and VSS.

NO.EA-421-250606 Discharge Overcurrent Detector / Short-circuit Protector (VD3 / VSHORT) While charge and discharge are acceptable with the battery pack, VD3 monitors the voltage level of V - pin. In the cause of such as the external short circuit, if the voltage level of V- pin may become more than the discharge overcurrent detection voltage and less than the short detection voltage, the discharge overcurrent detector works. When the voltage level of V- pin becomes more than short detection voltage, the short-circuit protector works and the output level of D OUT pin becomes “L”, and by turning off an external Nch. MOSFET, VD3 protects against flowing extremely large current into the circuit. An output delay time for the discharge overcurrent detection is internally fixed. Although the voltage of V - pin becomes more than the discharge overcurrent detection voltage and less than short detection voltage, if it becomes less than the discharge overcurrent detect ion voltage within the output delay time, the overcurrent detector does not work. Output delay time for release from discharge overcurrent is also set internally. In terms of short -circuit protector, output delay time is typically 300µ s. The V- pin has a built -in pull down resistor, Typ. 15kΩ connected to the VSS pin. After a discharge overcurrent or short circuit protection is detected, by removing a cause of overcurrent or external short circuit, the voltage level of V- is pulled down through the resistor for release from overcurrent to the VSS level. Then, when the voltage level of V- pin becomes less than the overcurrent detection voltage, both protection circuits are released automatically. Resistor for release from discharge overcurrent is active when discharge overcurrent or short-circuit is detected. While charge and discharge are acc eptable for the battery pack, or normal mode, the resistor is inactive. Output delay time for discharge overcurrent is necessarily set shorter than output delay time for overdischarge. Therefore, if discharge overcurrent is detected, and at the same time, V DD pin voltage becomes lower than overdischarge detection voltage, discharge overcurrent detector is predominant. By disconnecting load from the battery pack, the battery pack is automatically released from overcurrent state.

NO.EA-421-250606 Timing Chart of Overdischarging, Discharge Overcurrent, and Short-circuit Delay Shortening (DS) When the COUT is "H", the output delay time of detection at overcharging / overdischarging can be shorter than default values by forcing lower than the delay shortening mode voltage to V- pin. V DET1 V REL1 VDD COUT V DD V DD V DET3 V SS V DET4 tVDET1 Connect Charger Open tVREL1 tVDET1 Connect Charger Connect Load tVREL1 Excess Charge Current Connect Load tVDET4 tVREL4 t t t t Charge/ Discharge Current Charge Current Discharge Current

NO.EA-421-250606

APPLICATION INFORMATION

Typical Application Circuit VDD COUT DOUT VSS 0.1µF 1kΩ 330Ω R5492N RVDD CVDD RV- R5492N Typical Application Circuit Technical Notes on the Selection Components

• Since RVDD and CVDD stabilize a supply voltage to the IC, a recommended value of RVDD is less than 1 kΩ. If making RVDD larger, the conduction current flowed in the IC will make the detection voltage larger. For stabilizing operation, connect the CVDD of 0.01µF or more.
• R VDD and RV- limit a current when the battery pack is reverse- charged or when the charger having supply voltage exceeded the absolute maximum rating is connected. A total of RVDD and RV- should be 1kΩ or more. If RVDD and RV- become small value, the IC might exceed the power dissipation. Besides, RV- should be 10kΩ or less. If RV- becomes large value, a release by connecting with the charger might be impossible after overdischarging.
• Overvoltage and overcurrent exceeded the absolute maximum rating should not be forced to the protection IC and external components. If positive terminal and negative terminal of the battery pack short, even though the short-circuit protection is incorporated, during the delay time until detecting the short circuit, a large current may flow through an external MOSFET. Select an MOSFET with large enough current capacity in order to endure the large current during the delay time.
• The typical application circuit diagram is just examples. This circuit performance largely depends on the PCB layout and external components. In the actual application, fully evaluation is necessary.

NO.EA-421-250606 TECHNICAL NOTES A peripheral component or the device mounted on PCB should not exceed a rated voltage, a rated current or a rated power. When designing a peripheral circuit, please be fully aware of the following points.

• Please evaluate the product at the PCB level before use, as some symptoms may remain that cannot be confirmed by the evaluation at the IC level.
• When using any coating or underfill to improve moisture resistance or joining strength, evaluate them adequately before using. In certain materials or coating conditions, corrosion by contained constituents, current leakage by moisture absorption, crack and delamination by physical stress can happen. If the curing temperature of the coating material or underfill material exceeds the absolute maximum rating, the electrical characteristics of this product may change.
• When performing X -ray inspection in mass production process and evaluation build stage such as the product functions and characteristics confirmation, please confirm X -ray irradiation does not exceed 1.5Gy (absorbed dose for air).

Ver. C i ①②③ : Product Code … Refer to Part Marking List ④⑤: Lot Number … Alphanumeric Serial Number R5492N (SOT-23-6) Part Markings NOTICE There can be variation in the marking when different AOI (Automated Optical Inspection) equipment is used. In the case of recognizing the marking characteristic with AOI, please contact our sales or distributor before attempting to use AOI. R5492NxxxKL Part Marking List Product Name  Product Name  R5492N101KL B00 R5492N369 KL B 15 R5492N102KL B01 R5492N110KL B02 R5492N149KL B03 R5492N163KL B04 R5492N173KL B05 R5492N187KL B06 R5492N218KL B07 R5492N227KL B08 R5492N280KL B09 R5492N345KL B10 R5492N350KL B11 R5492N351KL B12 R5492N352KL B13 R5492N367KL B14

PACKAGE DIMENSIONS SOT-23-6 DM-SOT-23-6-JE-B i SOT-23-6 Packag e Dimensions (Unit: mm) 2.9±0.2 1.9±0.2 (0.95) (0.95) 6 4 1 2 3 1.6-0.1 +0.2 2.8±0.3 0.4-0.2 Unit : mm +0.1 0.8±0.1 1.1-0.1 +0.2 0 to 0.1 0.15-0.05 +0.1 0.2MIN.

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