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TJ1051CD

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER FOR ADATPTORS AND BATTERY CHARGERS

HTC Korea 

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER

FOR ADATPTORS AND BATTERY CHARGERS

TJ1051

ELECTRICAL CHARACTERISTICS

Tamb = 25℃ and Vcc = +5V (unless otherwise specified)

Symbol

Parameter

Total Current Consumption

Total Supply Current - not taking the

Icc

output sinking current into account

Voltage Control Loop

Gmv

Transconduction Gain (Vctrl). Sink

Current Only 1)

Vref Voltage Control Loop Referenc 2)

Iibv Input Bias Current (Vctrl)

Current Control Loop

Gmi

Transconduction Gain (Ictrl). Sink

Current Only 3)

Vsense Current Control Loop Reference4)

Iibi Current out of pin Ictrl at - 200mV

Output Stage

Vol

Low output voltage at 10 mA sinking

Current

Ios Output Short Circuit Current. Output to

Vcc. Sink Current Only

Test Condition

Tamb

0 < Tamb < 85℃

Tamb

0 < Tamb < 85℃

Tamb

0 < Tamb < 85℃

Tamb

0 < Tamb < 85℃

Tamb

0 < Tamb < 85℃

Iout =2.5mA Tamb

0 < Tamb < 85℃

Tamb

0 < Tamb < 85℃

Tamb

0 < Tamb < 85℃

Tamb

0 < Tamb < 85℃

Min Typ Max Unit

1.1

2

mA

1.2

1

1.198

1.186

3.5

2.5

1.21

50

100

mA/mV

1.222

V

1.234

nA

1.5

7

mA/mV

196

204

200

mV

192

208

25

㎂

50

200

mV

27

50 mA

35

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

3

HTC

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