CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
FOR ADATPTORS AND BATTERY CHARGERS
ELECTRICAL CHARACTERISTICS
Tamb = 25
℃
and Vcc = +5V (unless otherwise specified)
Symbol
Total Current Consumption
TJ1051
Parameter
Total Supply Current - not taking the
output sinking current into account
Transconduction Gain (Vctrl). Sink
Current Only
1)
Voltage Control Loop Referenc
Input Bias Current (Vctrl)
2)
Test Condition
Min
Typ
Max
Unit
Icc
Tamb
0 < Tamb < 85
℃
1.1
1.2
2
mA
Voltage Control Loop
Gmv
Vref
Iibv
Tamb
0 < Tamb < 85
℃
Tamb
0 < Tamb < 85
℃
Tamb
0 < Tamb < 85
℃
1
1.198
1.186
3.5
2.5
1.21
50
100
1.222
1.234
mA/mV
V
nA
Current Control Loop
Gmi
Transconduction Gain (Ictrl). Sink
Current Only
3)
4)
Tamb
0 < Tamb < 85
℃
Iout =2.5mA Tamb
0 < Tamb < 85
℃
Tamb
0 < Tamb < 85
℃
Tamb
0 < Tamb < 85
℃
Tamb
0 < Tamb < 85
℃
1.5
196
192
7
200
25
50
204
208
mA/mV
mV
Vsense
Current Control Loop Reference
Iibi
Current out of pin Ictrl at - 200mV
㎂
Output Stage
Vol
Ios
Low output voltage at 10 mA sinking
Current
Output Short Circuit Current. Output to
Vcc. Sink Current Only
200
27
35
50
mV
mA
1) If the voltage on Vctrl (the negative input of the amplifier) is higher than the positive amplifier input (Vref=1.210V),
and it is increased by 1mV, the sinking current at the output OUT will be increased by 3.5mA.
2) The internal Voltage Reference is set at 1.210V (bandgap reference). The voltage control loop precision takes into
account the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the trans
conductance operational amplifier. The internal Voltage Reference is fixed by bandgap, and trimmed to 0.5% accuracy
room temperature.
3) When the positive input at Ictrl is lower than - 200mV, and the voltage is decreased by 1mV, the sinking current at the
output OUT will be increased by 7mA.
4) The internal current sense threshold is set to - 200mV. The current control loop precision takes into account
the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the trans-
conduction operational amplifier.
Jan. 2007-Rev 1.0
HTC
3
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
