TSM1052 Просмотр технического описания (PDF) - STMicroelectronics

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TSM1052

Constant voltage and constant current controller for battery chargers and adapters

STMicroelectronics 

TSM1052

2

Electrical characteristics

Electrical characteristics

TJ = 25°C and VCC = 5V, unless otherwise specified

Table 5.

Symbol

Electrical characteristics

Parameter

Test conditions Min Typ Max Unit

Device supply

VCC Voltage operating range

Quiescent current

ICC (Ictrl = Vsense = Vctr = 0,

OUT = open)

1.7

18

V

150

µA

(1)

300

Voltage control loop Op-Amp

Transconductance

Gmv (sink current only) (2)

Vref Voltage reference (3)

Ibias Inverting input bias current

1 3.5

S

(1)

2.5

1.198 1.21 1.222

V

(1)

1.186

1.234

50

nA

(1)

100

Current control loop

Transconductance

Gmi (sink current only) (4)

1.5 7

S

(1)

Current loop reference (5)

Vsense

@ I(Iout) = 1 mA

(1)

Ibias

Non-inverting input source current @

V(Ictrl) = -200 mV

(1)

196 200 204

mV

192

208

20

µA

40

Output stage

VOUTlow Low output level @ 2 mA sink current

(1)

100

mV

200

1. Specification referred to -10 °C < TA < 85 °C

2. If the voltage on Vctrl (the negative input of the amplifier) is higher than the positive amplifier input

(Vref = 1.21 V), and it is increased by 1mV, the sinking current at the output OUT will be increased by

3.5mA.

3. The internal Voltage Reference is set at 1.21 V (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 transconductance operational amplifier. The internal Voltage Reference is fixed by

bandgap, and trimmed to 0.5% accuracy at room temperature.

4. 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.

5. The internal current sense threshold is set at -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

transconductance operational amplifier.

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