CONSTANT VOLTAGE & CONSTANT CURRENT CONTROLLER
ELECTRICAL CHARACTERISTICS
TJ1052
(T
A
=25℃ and V
CC
= +5V, unless otherwise specified)
Symbol
Parameters
Condition
Min.
Typ.
Max.
Unit
Total Current Consumption
I
CC
Total Supply Current - not taking the
output sinking current into account
T
A
= 25℃
0 < T
A
< 85°C
1.1
1.2
2
mA
Voltage Control Loop
G
MV
V
REF
I
IBV
Transconduction Gain (V
CTRL
).
Sink Current Only
(Note 1)
T
A
= 25℃
0 < T
A
< 85°C
T
A
= 25℃
0 < T
A
< 85°C
T
A
= 25℃
0 < T
A
< 85°C
1
1.198
1.186
3.5
2.5
1.21
200
300
1.222
1.234
mA/mV
V
nA
Voltage Control Loop
(Note 2)
Input Bias Current (V
CTRL
)
Current Control Loop
G
MI
V
SENSE
I
IBI
Transconduction Gain (I
CTRL
).
Sink Current Only
(Note 3)
T
A
= 25℃
0 < T
A
< 85°C
Iout = 2.5 mA
0 < T
A
< 85°C
T
A
= 25℃
0 < T
A
< 85°C
1.5
196
192
7
200
30
40
204
208
mA/mV
mV
μA
Current Control Loop
(Note 4)
Current out of pin I
CTRL
at -200mV
Output Stage
V
OL
I
OS
Low output voltage at 10 mA sinking
current
Output Short Circuit Current. Output to
V
CC
. Sink Current Only
T
A
= 25℃
0 < T
A
< 85°C
T
A
= 25℃
0 < T
A
< 85°C
200
500
45
60
90
mV
mA
Note 1. If the voltage on V
CTRL
(the negative input of the amplifier) is higher than the positive amplifier input (V
REF
=1.210V), and it is increased
by 1mV, the sinking current at the output will be increased by 3.5mA.
Note 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 at room temperature.
Note 3. When the positive input at I
CTRL
is lower than -200mV, and the voltage is decreased by 1mV, the sinking current at the output will be
increased by 7mA.
Note 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.
Jul. 2010 – Preliminary
-3-
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
