BTS5576G Infineon Technologies, BTS5576G Datasheet - Page 2

• Manufacturer Part Number: BTS5576G
• Description: IC LED DRIVER DSO-36
• Manufacturer: Infineon Technologies

Specifications of BTS5576G

• Topology: PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 5
• Internal Driver: Yes
• Type - Primary: Automotive
• Frequency: 2MHz
• Voltage - Supply: 3.8 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: DSO-36
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Operating Temperature: -
• Current - Output / Channel: -
• Efficiency: -
• Lead Free Status / Rohs Status: Details
• Other names: BTS5576G; BTS5576GTR; SP000255737

1
Note: The following information is given as a hint for the implementation of the device only and shall not be
This Application Note is intended to provide detailed application hints regarding the implementation of a software
strategy for diagnosis during PWM-operation of the BTS5590G, BTS5576G and
Controllers. General information about the SPI Power Controller can be found in the BTS5590G, BTS5576G and
BTS5566G data sheets.
2
The BTS5590G, BTS5576G and BTS5566G are five channel high-side power switches, which are especially
designed to control standard exterior front and rear lighting in automotive applications.
Configuration and status diagnosis is done via SPI. Additionally, there is a current sense signal available for each
channel that is routed via a multiplexer to one diagnostic pin.
This document will show how to implement a software strategy to ensure a correct diagnosis evaluation during
PWM-operation.
3
The BTS5590G, BTS5576G and BTS5566G have an integrated status diagnosis, which provides information
about each channel. The error flags, an “OR-combination” of the over temperature flags and the over load (
I
The over load monitoring signals are latched in the error flags and cleared each time the standard diagnosis is
transmitted via SPI. In detail, they are cleared between the second and third raising edge of the SCLK signal.
The over temperature flags, which cause an overheated channel to stay switched off, are latched directly at the
gate control block. The latches are cleared by SPI command HWCR.CTL.
In case of high duty cycles (off state of output <
for the power Mosfet. Due to this the over load monitoring signals may be set and latched in the error flags.
For further details please refer to the datasheet.
3.1
During PWM-operation (Pulse Width Modulation) with high duty cycles, where the off-phase (via input or via SPI-
register OUT.x) of the channel is shorter than 350µs for bulb-mode or 150µs in LED-mode respectively the over
load flag within the standard diagnosis may be set. It may be set during the switching on transition.
The ERR-flag activated due to the above mentioned condition will be reset with a single readout of the standard
diagnosis. The standard diagnosis is read with every write command or with the explicit standard diagnosis read
command 01h.
In case of an over temperature error the ERR-flag will not be reset by reading the standard diagnosis only,
because the thermal latch has to be cleared as well (HWCR.CTL).
The following scope plots show the continuous readouts of the standard diagnosis for PWM-operation of channel 0
with an ohmic load. The curves show the discrete input signal, the SPI clock, the SO signal and the output voltage
V
Application Note
L(
OUT
LIM)
.
) monitoring signals are provided in the SPI standard diagnosis bits ERRn.
regarded as a description or warranty of a certain functionality, condition or quality of the device.
Abstract
Introduction
Functionality of Over Load and Short Circuit Detection
Behavior of Error Flags during PWM
t
off state_min
2
) the
V
DS
may not reach the steady state off-value of
BTS5590G, BTS5576G, BTS5566G
BTS5566G SPI Power
Application Note
1.0, 2008-07-14
Abstract
I
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