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參數資料
| 型號： | 214Z |
| 廠商： | Intersil Corporation |
| 英文描述： | Li-ion/Li-Polymer Battery Charger Accepting Two Power Sources |
| 中文描述： | 鋰聚合物電池充電器可供兩個電源 |
| 文件頁數： | 7/11頁 |
| 文件大?。?/td> | 197K |
| 代理商： | 214Z |
7
FN9271.1
November 30, 2006
Functional Pin Description
CRDL (Pin 1)
Cradle input. This pin is usually connected to a cradle power
input. The maximum input voltage is 28V. The charge
current from this pin is programmable with the ICDL pin up to
1A. When this pin is connected to a power source, no charge
current is drawn from the USB pin. A 1μF or larger value
ceramic capacitor is recommended for decoupling.
USB (Pin 2)
USB input. This pin is usually connected to a USB port
power connector. Other sources that are also acceptable.
The charge current from the USB pin is fixed at typically
380mA. A 1μF or larger value ceramic capacitor is
recommended for decoupling. It is also recommended to
have a 1
Ω
resistor in series with the decoupling capacitor to
prevent an over-shoot voltage when a USB cable is plugged
in.
PPR (Pin 3)
Power presence indication. An open-drain output pin which
turns ON when either the USB input voltage or the CRDL
input voltage is above its POR level, regardless if the
charger is enabled or disabled. Otherwise turns OFF. This
pin provides a wake-up signal to a microprocessor when
either the cradle or the USB power is connected.
CHG (Pin 4)
Charge indication pin. An open-drain output which turns ON
when the charge current is above programmable threshold.
Otherwise turns OFF.
EN (Pin 5)
Enable logic input. Connect to LOW or leave floating to
enable the charger.
IMIN (Pin 6)
IMIN is the programmable input for the end-of-charge
current. IMIN is calculated by the following equation:
Where R
IMIN
is in k
Ω.
IMIN is applicable for both cradle and
USB charging.
USBON (Pin 7)
The USBON pin is a control input to turn off the USB charge
function if desired. Connect to LOW or leave floating to turn
off USB charge.
GND (Pin 8)
System ground.
ICDL (Pin 9)
The ICDL pin has two functions. The first function is to
program the cradle charge current during the constant-
current mode. The voltage of this pin is 1.22V during the
constant-current mode of the cradle charger. The constant-
current mode current is programmed by the following
equations:
where R
ICDL
is the resistor in k
Ω,
connected to the ICDL pin
(see the Typical Application).
It is recommended that the charge current be programmed
in the range of 100mA to 1000mA.
FIGURE 9. CRADLE INPUT QUIESCENT CURRENT vs INPUT
VOLTAGE
FIGURE 10. USB INPUT QUIESCENT CURRENT vs INPUT
VOLTAGE
Typical Operating Performance
The test conditions for the Typical Operating Performance are: V
IN
= 5V, T
A
= +25°C,
R
ICDL
= 12.4k
Ω,
R
IMIN
= 10.0k
Ω
, V
BAT
= 3.7V, Unless Otherwise Noted
(Continued)
0
100
200
300
400
500
600
700
800
0
5
10
15
20
25
TEMPERATURE (°C)
Q
DISABLED
ENABLED
I
OUT
= 0mA
0
100
200
300
400
500
600
700
800
0
5
10
15
20
25
TEMPERATURE (°C)
Q
DISABLED
ENABLED
I
OUT
= 0mA
I
MIN
IMIN
----------------
mA
(
)
=
(EQ. 1)
I
CDL
ICDL
-----------------
mA
(
)
=
(EQ. 2)
ISL9214
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