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IK3051

Constant Voltage and Constant Current Controller for Adaptors and Battery Chargers

IK Semicon Co., Ltd 

IK3051

Absolute Maximum Ratings

Symbol

Vcc

Vi

Top

Tj

Parameter

DC Supply Voltage

Input Voltage

Operating Free Air Temperature Range

Maximum Junction Temperature

Value

Unit

14

V

-0.3 to Vcc

V

0 to 85

oC

150

oC

Operation Conditions

Symbol

Vcc

Parameter

DC Supply Conditions

Value

Unit

2.5 to 12

V

Electrical Characteristics

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

Symbol

Parameter

Total Current Consumption

Icc

Total Supply Current – not taking the

output sinking current into account

Voltage Control Loop

Gmv

Transconduction Gain (Vctrl). Sink

Current Only 1)

Vref Voltage Control Loop Reference 2)

Iibv Input Bias Current (Vctrl)

Current Control Loop

Gmi

Transconduction Gain (Ictrl). Sink

Current Only 3)

Vsense Current Control Loop Reference 4)

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°C

Tamb

0 < Tamb < 85°C

Tamb

0 < Tamb < 85°C

Tamb

0 < Tamb < 85°C

Tamb

0 < Tamb < 85°C

Iout = 2.5 mA Tamb

0 < Tamb < 85°C

Tamb

0 < Tamb < 85°C

Tamb

0 < Tamb < 85°C

Tamb

0 < Tamb < 85°C

Min Typ Max

1.1 2

1.2

1

1.198

1.186

3.5

2.5

1.21

50

100

1.222

1.234

1.5 7

196

192

200

204

208

25

50

200

27

35

50

Unit

mA

mA/mV

V

nA

mA/mV

mV

μA

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 at

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.

Rev. 00

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