Trickle Charge Mode
Min
Typ
Max
Unit
Charge current I
trickle
, as percentage of fast charge current
8
10
12
%
V
fast
rising threshold
-
2.9
-
V
V
fast
rising threshold trim step size
-
0.1
-
V
V
fast
falling threshold
-
2.8
-
V
Fast Charge Mode
Min
Typ
Max
Unit
Charge current during constant
current mode, I
fast
I-CTRL = 0x1f,
headroom > 0.55V
194
200
206
mA
I-CTRL = 0x00,
headroom > 0.55V
43
45
47
mA
Reduced headroom charge current,
as a percentage of I
fast
I-CTRL = 0x0f,
headroom = 0.15V
50
-
100
%
I-CTRL charge current step size
-
5
-
mA
V
float
threshold, calibrated
4.16
4.20
4.24
V
Standby Mode
Min
Typ
Max
Unit
Voltage hysteresis on VBAT, V
hyst
100
-
150
mV
Error Charge Mode
Min
Typ
Max
Unit
Headroom
(a)
error rising threshold
30
-
50
mV
Headroom
(a)
error threshold hysteresis
20
-
30
mV
(a)
Headroom = VCHG - VBAT
Advance Information
This material is subject to CSR's non-disclosure agreement
© Cambridge Silicon Radio Limited 2011
Page 80 of 110
CS-209182-DSP1
CSR8640 BGA
Data Sheet
