TSM1051 Datasheet, PDF (3/9 Pages) STMicroelectronics – CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER FOR BATTERY CHARGERS AND ADAPTORS

TSM1051
OPERATING CONDITIONS
Symbol
Vcc DC Supply Conditions
Parameter
ELECTRICAL CHARACTERISTICS
Tamb = 25°C and Vcc = +5V (unless otherwise specified)
Value
Unit
2.5 to 12
V
Symbol
Parameter
Test Condition
Min Typ Max Unit
Total Current Consumption
Icc Total Supply Current - not taking the
output sinking current into account
Tamb
0 < Tamb < 85°C
1.1
2
mA
1.2
Voltage Control Loop
Gmv
Vref
Iibv
Transconduction Gain (Vctrl). Sink
Current Only ¹⁾
Voltage Control Loop Reference ²⁾
Input Bias Current (Vctrl)
Tamb
0 < Tamb < 85°C
Tamb
0 < Tamb < 85°C
Tamb
0 < Tamb < 85°C
1
3.5
2.5
mA/mV
1.198 1.21 1.222
V
1.186
1.234
50
100
nA
Current Control Loop
Gmi
Vsense
Transconduction Gain (Ictrl). Sink
Current Only ³⁾
Current Control Loop Reference ⁴⁾
Iibi Current out of pin ICTRL at -200mV
Tamb
0 < Tamb < 85°C
Iout = 2.5mA Tamb
0 < Tamb < 85°C
Tamb
0 < Tamb < 85°C
1.5
7
mA/mV
196 200 204
mV
192
208
25
50
µA
Output Stage
Vol Low output voltage at 10 mA sinking Tamb
current
0 < Tamb < 85°C
200
mV
Ios Output Short Circuit Current. Output to Tamb
Vcc. Sink Current Only
0 < Tamb < 85°C
27
50
35
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.
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