Diodes APM8601 - Manual (Page 6)

APM8601
DUAL CHANNEL SINGLE CELL LINEAR LITHIUM BATTERY
CHARGER WITH 28V OVP and PROGRAMMABLE CHARGE
TIMER
APM8601
Document number: DS35138 Rev. 1 - 2
6 of 14
www.diodes.com
December 2010
© Diodes Incorporated
NEW PROD
UC
T
Electrical Characteristics (Continued)
APM8601 is tested at V
DC
= V
USB
= 5V, V
BAT
= 4V, V
EN
= 0V, R
SETI
= 2k Ω, C
CT
= 68nF, at an ambient temperature of +25°C
unless otherwise noted.
Symbol Parameter Test Conditions Min Typ. Max Unit
EN , USEL
Logic Input Thresholds
Rising 1.6
V
Falling 0.4
Logic Input Leakage Current EN
V = V
USEL
= 0 to 5.5V,
T
A
= 25ºC
0.001 1 µA
POK , CHG , FLT
Logic Output Voltage, Low 1mA I I I
FLT CHG POK
= = =
12 100 mV
Logic Output Leakage Current,
High
5.5V V V V
FLT CHG POK
= = =
V
DC
= V
USB
= 0V
T
A
= +25°C
0.001 1 µA
I
TOPOFF CHG / Top-Off Threshold
I
BAT
falling,
battery is
charged
R
SETI
= 1.5k Ω 75
mA R
SETI
= 2.0k Ω 37.5 56.25 75
R
SETI
= 5.0k Ω 22.5
R
THM_Pullup
Internal Pullup Resistance 10 k Ω
R
THM
THM Resistance, Hot R
THM
falling, 420 Ω hyst. (typ.) 3.72 3.94 4.13 k Ω
THM Resistance, Cold R
THM
rising, 2.7k Ω hyst. (typ.) 26.7 28.3 29.7 k Ω
THM Resistance, Disabled R
THM
falling, 230 Ω hyst. (typ.) 260 315 370 Ω
CT
accu
Charge Timer Accuracy C
CT
= 68nF -20 +20 %
TL
Prequal
Prequal Time Limit
From entering prequal to
FLT
going low, V
BAT
< 3V
34.8 min
TL
CHG
Charge Time Limit
From entering fast-charge to
FLT
going low, 3V < V
BAT
<
4.2V
334 min
TL
Top_off
Top-Off Time Limit
From CHG going high to
charger disabled
34.8 min
THFB
temp
Thermal Foldback Threshold
Temperature
Junction temperature beyond
which the charge current is
reduced, T
J
rising
+100 ºC
THFB
Gain
Thermal Foldback Gain
Reduction of I
BAT
for increase
in T
J
(using V
DC
), R
SETI
=
1.5k Ω
5 %/ºC