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PDF APL3212A Data sheet ( Hoja de datos )
| Número de pieza | APL3212A | |
| Descripción | (APL3212A/B/C) Li+ Charger Protection IC | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APL3212A/B/C
Li+ Charger Protection IC
Features
• Provide Input Over-Voltage Protection
• Programmable Input Over-Current Protection
• Battery Over-Voltage 4.35V/4.435V Protection
• Over-Temperature Protection
• High Immunity of False Triggering
• High Accuracy Protection Thresholds
• Fault Status Indication
• Enable Input
• Available in TDFN2x2-8 Package
• Lead Free and Green Devices Available
(RoHS Compliant)
General Description
The APL3212A/B/C provide complete Li+ charger protec-
tions against over-voltage, over-current, and battery over-
voltage. The IC is designed to monitor input voltage, in-
put current, and battery voltage. When any of the moni-
tored parameters are over the threshold, the IC removes
the power from the charging system by turning off an in-
ternal switch. All protections also have deglitch time
against false triggering due to voltage spikes or current
transients. The APL3212A/B/C also provide over-tempera-
ture protection, a FAULT output pin to indicate the fault
conditions, and the EN pin to allow the system to disable
the IC.
Applications
• Smart Phones and PDAs
• Digital Still Cameras
• Portable Devices
Pin Configuration
ACIN 1
GND 2
BATSL 3
FAULT 4
8 OUT
7 ILIM
6 BAT
5 EN
TDFN2x2-8 (Top View)
Simplified Application Circuit
5V Adapter
or USB
ACIN OUT
APL3212A/B/C
EN FAULT
BATSL
ILIM BAT
GND
Charger Input
Charger Output
and System
Li+
Battery
= Exposed Pad (connected to ground
plane for better heat dissipation)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Sep., 2013
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
1 page  
APL3212A/B/C
Typical Operating Characteristics
Input OVP Threshold vs. Junction
Temperature
6.8
6.7
VIN Increasing
6.6
6.5
6.4
6.3
6.2
-40
VIN Decreasing
0 40 80 120
Junction Temperature (oC)
Battery OVP Threshold vs. Junction
Temperature
4.5
BATSL=High
4.4
4.3
VBAT Increasing
4.2
4.1
4
3.9
-40
VBAT Decreasing
0 40 80 120
Junction Temperature (oC)
POR Threshold vs. Junction
Temperature
2.6
2.5
VIN Increasing
2.4
2.3
2.2
2.1
2
-40
VIN Decreasing
0 40 80 120
Junction Temperature (oC)
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Sep., 2013
5
Battery OVP Threshold vs. Junction
Temperature
4.6
BATSL=Low
4.5
4.4
VBAT Increasing
4.3
4.2
4.1 VBAT Decreasing
4
-40 0
40 80 120
Junction Temperature (oC)
IN Supply Current vs. Junction
Temperature
280
260
240
220
200
180
-40
0 40 80 120
Junction Temperature (oC)
OCP Threshold vs. Junction
Temperature
1.5
1.3
1.1
0.9
0.7
0.5
-40
0 40 80 120
Junction Temperature (oC)
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APL3212A/B/C
Function Description
ACIN Power-On-Reset (POR)
The APL3212A/B/C have a built-in power-on-reset circuit
to keep the output shutting off until internal circuitry is
operating properly. The POR circuit has hysteresis and a
de-glitch feature so that it will typically ignore undershoot
transients on the input. When input voltage exceeds the
POR threshold and after 8ms blanking time, the output
voltage starts a soft-start to reduce the inrush current.
Input Over-Voltage Protection (OVP)
The input voltage is monitored by the internal OVP circuit.
When the input voltage rises above the input OVP
threshold, the internal FET will be turned off within 1µs to
protect connected system on OUT pin. When the input
voltage returns below the input OVP threshold minus the
hysteresis, the FET is turned on again after 8ms recovery
time. The input OVP circuit has a 250mV hysteresis and
a recovery time of T
to provide noise immunity
ON(OVP)
against transient conditions.(see Figure 2.)
Over-Current Protection (OCP)
The output current is monitored by the internal OCP circuit.
When the output current reaches the OCP threshold, the
device limits the output current at OCP threshold level. If
the OCP condition continues for a blanking time of T ,
B(OCP)
the internal power FET is turned off. After the recovery
time of TON(OCP), the FET will be turned on again and the
output current is monitored again. The OCP threshold is
programmed by a resistor RILIM connected from ILIM pin
to GND. The OCP threshold is calculated by the following
equation:
IOCP = KILIM
RILIM
where
KILIM=25000AΩ
Battery Over-Voltage Protection
The APL3212A/B/C monitor the BAT pin voltage for battery
over-voltage protection. The battery OVP threshold is in-
ternally set to 4.35V. When the BAT pin voltage exceeds
the battery OVP threshold for a blanking time of TB(BOVP),
the internal power FET is turned off. When the BP voltage
returns below the battery OVP threshold minus the
hysteresis, the FET is turned on again. The APL3212A/B/
C have a built-in counter. When the total count of battery
OVP fault reaches 16, the FET is turned off permanently,
requiring either a VIN POR or EN re-enable again to restart.
Over-Temperature Protection
When the junction temperature exceeds 140οC, the inter-
nal thermal sense circuit turns off the power FET and
allows the device to cool down. When the device’s junc-
tion temperature cools by 20οC, the internal thermal sense
circuit will enable the device, resulting in a pulsed output
during continuous thermal protection. Thermal protec-
tion is designed to protect the IC in the event of over tem-
perature conditions. For normal operation, the junction
temperature cannot exceed T =+125 οC.
J
FAULT Output
The APL3212A/B/C provide an open-drain output to indi-
cate that a fault has occurred. When any of input OVP,
OCP, battery OVP, is detected, the FAULT goes low to
indicate that a fault has occurred. Since the FAULT pin is
an open-drain output, connecting a resistor to a pull high
voltage is necessary.
Enable/Shutdown
Pull the EN pin voltage above 1.4V to disable the device
and pull EN pin voltage below 0.4V to enable the device.
The EN pin has an internal pull-down resistor and can be
left floating. When the IC is latched off due to the total
count of OCP or battery OVP reaches 16, disable and re-
enable the device with the EN pin can clear the counter.
ESD Tests
The APL3212A/B/C VIN input pin fully supports the
IEC61000-4-2. That means the VIN pin has immunity of
+15kV ESD discharge in Air condition, and immunity of
+8kV ESD discharge in Contact condition.
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Sep., 2013
11
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 20 Páginas | |
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