TSM1051_08 Datasheet, PDF (5/15 Pages) STMicroelectronics – Constant voltage and constant current controller for battery chargers and adaptors

TSM1051
2
Electrical characteristics
Electrical characteristics
T_A = 25 °C and V_CC = +5 V (unless otherwise specified)
Table 6.
Symbol
Electrical characteristics
Parameter
Test condition Min Typ Max Unit
Total current consumption
I_CC
Total supply current - not taking the
output sinking current into account
Voltage control loop
0 < T_A < 85 °C
1.1 2
mA
1.2
Gmv
Transconduction gain (Vctrl). sink
current only ⁽¹⁾
V_ref Voltage control loop reference ⁽²⁾
Iibv Input bias current (Vctrl)
Current control loop
0 < T_A < 85 °C
0 < T_A < 85 °C
0 < T_A < 85 °C
1 3.5
2.5
mA/mV
1.198 1.21 1.222
V
1.186
1.234
50
nA
100
Gmi
Transconduction Gain (Ictrl). Sink
Current Only ⁽³⁾
V_SENSE Current control loop reference ⁽⁴⁾
Iibi Current out of pin ICTRL at -200 mV
Output stage
I_O = 2.5 mA
0 < T_A < 85 °C
I_O = 2.5 mA
0 < T_A < 85 °C
1.5 7
196 200
192
25
50
mA/mV
204
mV
208
µA
V_OL
Low output voltage at 10 mA sinking
current
200
mV
I_OS
Output short circuit current. output to
vcc. sink current only
0 < T_A < 85 °C
27 50
mA
35
1. If the voltage on V_CTRL (the negative input of the amplifier) is higher than the positive amplifier input(V_ref =
1.210 V), and it is increased by 1mV, the sinking current at the output OUT will be increased by 3.5 mA.
2. The internal Voltage Reference is set at 1.210 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 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 I_CTRL is lower than -200 mV, and the voltage is decreased by 1mV, the sinking
current at the output OUT will be increased by 7 mA.
4. The internal current sense threshold is set to -200 mV. 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.
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