TLE4224-2 Datasheet, PDF (4/8 Pages) Siemens Semiconductor Group – Smart Low-Side Switch

Preliminary data sheet TLE 4224-2/S2
Electrical Characteristics
Parameter and Conditions
V_S = 6.5 to 45 V ; T_j = - 40 °C to + 150 °C
(unless otherwise specified)
Symbol Values
min typ
Unit
max
5. Diagnostic Functions
Open load detection voltage V_C = 0 V; 8 ≤ V_S ≤ 18 V
(Output OFF)
6.5 ≤ V_S ≤ 45 V
Open load compare detection
6.5 ≤ V_C ≤ 18 V
Open load detection current (Output ON)
Overload threshold current
V_S ≥ 9.5 V
Overtemperature shutdown threshold ⁴
T_j = 25°C
T_j = 150°C
Hysteresis
V_C-Input current
V_C ≤ 18 V
V_DS(OL)
V_DS(OL)C
I_D(OL)
I_D(lim)
T_th
T_hys
I_VC
0.5*V_S
0.45*V_S
V_C -1.6
100
5.25
4
155
0.6*V_S
V
0.65*V_S
V_C -0.9
V
500 mA
A
A
185 °C
10
K
0.25 mA
Application Description
This IC is specially designed to drive inductive loads (relays, electromagnetic valves). An integrated
clamp-diode limits the output voltage when inductive loads are discharged.
For the detection of errors there is a open-drain status output, which monitors the following errors by
logic level:
- overloading of output (also shorted load to supply) in active mode
- open and shorted load to ground in active and inactive mode
- thermal overload.
Circuit Description
Input Circuits
The control and enable inputs, all active high, consist of schmitt triggers with hysteresis. All inputs are
connected with pull-down current sources. Not connected inputs are interpreted as LOW.
Switching Stages
The power output consists of a DMOS-power transistor with open drain. The output stage is shorted
load protected troughout the operating range. The integrated clamp-diode limit voltage spikes produ-
ced when inductive loads are discharged.
4 _{This parameter will not be tested but assured by design}
Semiconductor Group
Page ₄
20.12.96