Cinterion DSB75 - Page 82

DSB75 Development Support Board Rev. B1 Hardware Description
Confidential / Released

DSB75_hd_v12 Page 82 of 96 2008-08-26
Parameters Condition Min. Typical Max. Unit
Charger voltage 4.75 6.6 10 V
Fast charging current
(Jumper X600 not set)
450 500 550 mA
Fast charging current
(Jumper X600 set)
950 1000 1050 mA
Trickle charge current
(Deep Discharge
Lockout)
4 5 7 mA
Charging interface
Trickle charge current
(Undervoltage Lockout)
25 30 35 mA
Battery voltage 3.3 3.8 4.2 V
NTC to ground at
BATTEMP (near
battery) @ 25˚C
10
See module
specification
[1] for detail.
k
Battery interface
Peak current 2.5 A
Output voltage range
(load resistance 5k)
± 4.9 ± 5.0 ± 5.4
V
Output short-circuit
current
± 19
mA
Output resistance 520 
Input voltage range -25 25 V
Input resistance 3.2 5.2 7.2 k
Input threshold low 0.65 1.25 V
RS-232 interfaces
COM1 to COM3
Input threshold high 1.6 2.5 V
V
OL
0.4 V
V
OH
2.8 5.0 V
V
IL
0.8 V
V
IH
2.4 5.3 V
Internal pull-up resistor
3.3 k
I
2
C interface 5V
External pull-up resistor
recommended
3.2 3.3 k
External pull-up resistor
required
0.75 1 k
I
2
C interface 3V
Voltage levels See module specification
[1] for detail.