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PDF AH8815 Data sheet ( Hoja de datos )
| Número de pieza | AH8815 | |
| Descripción | Protection IC | |
| Fabricantes | AnalogChipTech | |
| Logotipo |  |
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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
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AH8815
TYPICAL APPLICATION DIAGRAM
Figure 1, Typical Application Diagram for 5-series cell with N-type Charge-FET & Discharge-FET
ABSOLUTE MAXIMUM RATINGS
Over operating free-air temperature range (unless otherwise noted)
PARAMETER
Input Voltage between VCC and VSS
Low-voltage Input pin Voltage
High-voltage Input pin Voltage
VMON pin Input Voltage
SYMBOL
VCC
VIN_LV
VIN_HV
VVMON
APPLICABLE PIN
VCC
CS, CUVT, COVT, TS,
VTHM
CTRL, SEL
VMON
- RATING
VSS 0.3V to VSS+35V
-VSS 0.3V to VSS +5.5V
-VSS 0.3V to VSS+35V
-VSS 5.5V to VCC+0.3V
Cell voltage input voltage:
VC(n) to VC(n-1), n=2 to 5;
VC1 to VSS
CFET pin output voltage
DFET pin output voltage
HBM ESD rating
Operating free-air temperature range
Storage temperature range
VCELL
VCFET
VDFET
TA
TSTG
VC5, VC4, VC3, VC2,
VC1
CFET
DFET
-0.3V to +7.0V
-VCC 35V to VCC+0.3V
-0.3V to +15V
±2kV
-40°C to +85°C
-40°C to +125°C
Package thermal resistance (TSSOP16)
θ
JA
48.7°C/W
Note 1: Human Body Model (HBM) to Specification MIL-STD-883 Method 3015.7
Note 2: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the
Recommended Operating Conditions are not implied. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
______________________________________________________________________________________
AnalogChipTech
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AH8815
OPERATION TIMING CHART
Over-Voltage and Under-Voltage detection
______________________________________________________________________________________
AnalogChipTech
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AH8815.PDF ] | |
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