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AH8815 Schematic ( Datenblatt PDF ) - AnalogChipTech

Teilenummer AH8815
Beschreibung Protection IC
Hersteller AnalogChipTech
Logo AnalogChipTech Logo 

Gesamt 14 Seiten
		
AH8815 Datasheet, Funktion
13925292397_http://www.universe-micro.com/
AH8815
Protection IC for 5 Cells Li-ion Battery Pack
FEATURES
High Accuracy Voltage Detection
Over-Voltage Protection
o VOVP: 3.6V~4.35V (50mV/step)
o Accuracy: ±25mV
o Hysteresis voltage: 0V or 0.1V to
0.3V in 50mV/step
Under-Voltage Protection
o VUVP: 2.0V~3.0V (100mV/step)
o Accuracy: ±80mV
o Hysteresis voltage: 0V to 1V in
100mV/step
3-Levels Over-Current Detection
Level-1 Over-Current Protection:
o VOCP1: 25mV~350mV (25mV/step)
o Accuracy: ±10mV
Level-2 Over-Current Protection:
o VOCP2=3*VOCP1
o Accuracy: ±30mV
Short-Circuit Protection
o VSCP=5*VOCP1
o Accuracy: ±50mV
OC/SC release conditions:
Charger-Connected OR
Load-Opened
Built-in Over-Temperature Protection
Built-in Under-Temperature Protection
Delay times are set by external capacitors
Low-power Operating States:
Normal State: < 30uA
Standby State: < 3uA
Power-down State: < 1uA
Hardware Shut-down State: <0.1uA
16-Lead TSSOP Package
GENERAL DESCRIPTION
The AH8815 is a protection IC which includes high-
accuracy voltage detector and current detector to
provide Over-Voltage (OV), Under-Voltage (UV),
Over-Current (OC), Short-Circuit (SC), Over-
Temperature (OT), Under-Temperature (UT)
protection for 5-series Li-ion/polymer battery pack
used in power-tools, notebook PC applications etc.
The AH8815 provides a specific CTRL pin to
control both charge and discharge FET. When
CTRL is floating, the AH8815 will enter standby
state to save power consumption. Under standby
state, discharge FET is turned off while charge FET
is turned on. When CTRL is tied to VCC pin, the
AH8815 works in normal state, however, both
charge and discharge FET are turned off. When
CTRL is tied to VSS pin, the AH8815 works in
normal state, the state of charge and discharge
FET are decided according to safety events.
The AH8815 integrates FET driver. The AH8815
can drive the N-type charge FET and N-type
discharge FET at the PACK- side directly.
The AH8815 consumes less than 30uA in normal
state from VCC, and it reduces to less than 3uA in
standby state and less than 1uA in power-down
state. Furthermore, the AH8815 can be powered
from a switched supply, providing a technique to
reduce battery stack current draw to zero. This
device is packaged in a 16-pin TSSOP package.
APPLICATIONS
Power-Tools
Notebook PC/Tablet PC
UPS Backup Battery Systems
AnalogChipTech
http://www.universe-micro.com/
1






AH8815 Datasheet, Funktion
13925292397_http://www.universe-micro.com/
AH8815
ELECTRICAL CHARACTERISTICS
TA = +25°C, unless otherwise specified
Parameter
SYMBOL
CONDITIONS
Over-Voltage (OV) and Under-Voltage (UV) Protection
Over-Voltage
Protection Threshold
VOVP
3.6V to 4.35V in 50mV/step
MIN.
VOVP
-25
TYP.
VOVP
MAX.
VOVP
+25
Over-Voltage Release
Hysteresis Voltage
Over-Voltage Release
Threshold
Under-Voltage
Protection Threshold
VOVP_HYS
VOVR
VUVP
VOVR = VOVP – VOVP_HYS
2.0V to 3.0V in 100mV/step
0V or 0.1 to 0.3V in
50mV/step
VOVR
-25
VOVR
VOVR
+25
VUVP
-80
VUVP
VUVP
+80
Under-Voltage
Release Hysteresis
Voltage
Under-Voltage
Release Threshold
VUVP_HYS
VUVR
VUVR = VUVP + VUVP_HYS
0 to 1.0V in 100mV/step
VOVR
-80
VOVR
VOVR
+80
Discharge Over-Current (DOC) and Short-Circuit (SC) Protection
Level-1 Discharge
Over-Current
VDOCP1
Protection Threshold
25mV to 350mV in 25mV/step
VDOCP1
-10
VDOCP1
Level-2 Discharge
Over-Current
VDOCP2
Protection Threshold
VDOCP2=3*VDOCP1
VDOCP2
-30
VDOCP2
Short-Circuit
Protection Threshold
VSCP
VSCP=5*VDOCP1
VSCP
-50
VSCP
13925292397Discharge Over-Temperature (DOT) and Charge Over-Temperature (COT) Protection
Discharge
Over-Temperature
Protection Threshold
TDOTP
TDOTP
-5
TDOTP
Discharge
Over-Temperature
Release Hysteresis
TDOTP_HYS
15
Discharge
Over-Temperature
Release Threshold
TDOTR
TDOTR = TDOTP – TDOTP_HYS
TDOTP
-5
TDOTP
Charge
Over-Temperature
Protection Threshold
TCOTP
TCOTP
-5
TCOTP
Charge
Over-Temperature
Release Hysteresis
TCOTP_HYS
5
Charge
Over-Temperature
Release Threshold
TCOTR
TCOTR = TCOTP – TCOTP_HYS
TCOTP
-5
TCOTP
Charge
Under-Temperature
Protection Threshold
TCUTP
TCUTP
-5
TCUTP
Charge
Under-Temperature
Release Hysteresis
TCUTP_HYS
5
Charge
Under-Temperature
Release Threshold
TCUTR
TCUTR = TCUTP + TCUTP_HYS
TCUTR
-5
TCUTR
VDOCP1
+10
VDOCP2
+30
VSCP
+50
TDOTP
+5
TDOTP
+5
TCOTP
+5
TCOTP
+5
TCUTP
+5
TCUTR
+5
UNIT
mV
mV
mV
mV
mV
mV
mV
mV
mV
°C
°C
°C
°C
°C
°C
°C
°C
°C
______________________________________________________________________________________
AnalogChipTech
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AH8815 pdf, datenblatt
13925292397_http://www.universe-micro.com/
AH8815
Over-Current detection
13925292397
______________________________________________________________________________________
AnalogChipTech
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