LX2206ILD データシートの表示（PDF） - Microsemi Corporation
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LX2206ILD Datasheet PDF : 14 Pages
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LX2206
TM
®
Dual Level Lithium Ion Battery Charger
PRODUCTION DATA SHEET
APPLICATION NOTE
The final circuit for this example is:
VIN
TMP
121k
24.9k
RNTC
The TMP voltages with this circuit are:
TEMP (°C)
-20
0
25
60
80
RNTC
971k
327k
100k
24.9k
12.6k
VTMP (% VIN)
89%
74%
51%
29%
24%
INPUT POWER SOURCE DETECTION
In order to detect when the input power source has been
removed, the LX2206 requires that a small current (up to
200uA) momentarily flow out of the IN pin (in the reverse
direction). Once detected, the reverse IN current is shut off
(the IN pin becomes a very high impedance until an input
power source is later reapplied). In most applications, there
is sufficient loading on the IN pin from external circuitry to
accomplish this, which includes the “Full” and/or “Power
On” LED loads and the TFB resistor string. If there is no
external load on the IN pin, then it is recommended to
provide a 15k resistor from IN to GND as shown below.
Adapter or USB
15k
IN
CMP
1k 0.47uF LX2206
POWER STATUS INDICATORS
The STAT pin is designed to source or sink current. LEDs
can be configured to indicate charging or battery full. The
battery full indicator can be connected to DCOK rather than
GND to insure it is off when the input power is removed
and the STAT pin and DCOK pin go to a high impedance
state.
Conditions
Charge in process
Charge completed
Input power removed
STAT
Low
High
Hi Z
Copyright © 2007
Rev. 1.3a, 2007-08-28
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
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