TLE6270R Datasheet, PDF (12/35 Pages) Infineon Technologies AG – Quad Low Side Injector Driver

TLE6270R
Quad Low Side Injector Driver
Functional Description
5.3
Output Current Control
From the output current comparators and inputs signals, a logic circuit controls the 4 current levels IPC, IP, IH and
ID by commanding the high side drivers T2 and T3 via NCTL2 and NCTL3 (see Chapter 8). T2 and T3 are OFF
when NCTL2 and NCTL3 are at high level.
• IPC level is controlled between high and low values
IPC value can be programmed through Pgr_IPC pin
• IP level
the transition from IPC to IP is controlled by PCh pin
IP value can be programmed through Pgr_IP pin
• IH level is controlled between high and low values
the transition from IP to IH starts when peak level is reached
IH value can be programmed through Pgr_IH pin
• ID level is controlled between high and low values. ID is equal to IH.
the transition from IH to ID is controlled by NON1 or NON4 and PCh pins
the damp pulse is not present if there is no damp pulse command at NON1/4
• Currents values according to programming resistors (see also graph in Chapter 7)
– R_Pgr_IP = k_P / IP
– R_Pgr_IPC = k_PC / IPC
– R_Pgr_IH = k_H / IH
The theoretical Design calculation leads to k_P = 140000 = 8 × k_PC = 4 × k_H.
Note: If Pgr_IPC pin has no resistor and is connected to V_CC then there is no pre-charge and no damping. Then
the Pch signal is not used and the output is controlled directly by the NON input.
Data Sheet
12
V1.3, 2008-12-23