TLE7241E Datasheet, PDF (13/71 Pages) Infineon Technologies AG – Dual Channel Constant Current Control Solenoid Driver

TLE 7241E
Functional Description and Electrical Characteristics
5
Functional Description and Electrical Characteristics
Note: The listed characteristics are ensured over the operating range of the integrated
circuit. Typical characteristics specify mean values expected over the production
spread. If not otherwise specified, typical characteristics apply at T_A = 25 °C and
the given supply voltage.
5.1
Supply and Reference
The device has incorporated a power-on reset circuit. This feature will reset the
commanded average current to 0 mA (device off), and will reset the programmable
registers to their default values. The fault register bits are reset during power on reset.
The device will remain off until a valid command is received. The device will also be reset
in the case of an undervoltage condition on the pin V_DD. Note that if the voltage on the
pin REF pin is greater than the voltage on the pin V_DD, a current will flow from the REF
pin to the V_DD pin.
Electrical Characteristics ¹⁾
T_j = -40 to 150 °C; V_BAT = 9 V to 18 V; V_DD = 4.75 V to 5.25 V
Pos. Parameter
Symbol Limit Values Unit
Min. Typ.²⁾ Max.
Test Conditions and
Instructions
5.1.1 REF
I_REF
-20 –
Bias Current
20
μA V_REF = 2.5 V
(includes leakage current
and a small current sink)
5.1.2 V_DD
5 V Supply
Current
I_DD
––
15
mA V_DD = 5.25 V;
CSB = 5.0 V;
DAC = 3FF
5.1.3 V_SO
I/O Supply
Current
I_SO
––
1
mA V_SO = 5.25 V;
CSB = 5.0 V
5.1.4 BAT
I_BAT
–
–
1
mA V_DD = 5.25 V;
Supply Current
CSB = 5.0 V
5.1.5 V_DD
V_POR
Power-On Reset
Threshold
2.5 –
3.5 V Power-On Reset
Threshold
5.1.6 Internal
Reference
Voltage
V_IREF 2.45 2.5 2.55 V Tested at wafer test.
1) Positive current flow is into the device.
2) Target @T_J = 25 °C
Data Sheet
13
Rev. 1.1, 2009-01-19