TDA4863GNT Infineon Technologies, TDA4863GNT Datasheet - Page 11

• Manufacturer Part Number: TDA4863GNT
• Manufacturer: Infineon Technologies

Specifications of TDA4863GNT

• Start-up Supply Current: 20uA
• Operating Supply Voltage (min): 10V
• Operating Supply Voltage (max): 20V
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Package Type: DSO
• Pin Count: 8
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

To prevent false tripping the zero current detector is designed as a Schmitt-Trigger with
a hysteresis of 0.5 V. An internal 5 V clamp protects the input from overvoltage
breakdown, a 0.6 V clamp prevents substrate injection. An external resistor has to be
used in series with the auxiliary winding to limit the current through the clamps.
2.8
The restart timer function eliminates the need of an oscillator. The timer starts or restarts
the TDA4863 when the driver output has been off for more than 150 µs after the inductor
current reaches zero.
2.9
An undervoltage lockout circuitry switches the IC on when V
threshold V
During start up the supply current is less then 100 µA.
An internal voltage clamp has been added to protect the IC from V
condition. When using this clamp special care must be taken on power dissipation.
Start up current is provided by an external start up resistor which is connected from the
AC line to the input supply voltage V
V
the application board. Otherwise the IC can be destroyed due to the high capacitor
voltage.
Bootstrap power supply is created with the previous mentioned auxiliary winding and a
diode (see
2.10
The TDA4863 totem pole output stage is MOSFET compatible. An internal protection
ciruitry is activated when V
is turned off. The totem pole output has been optimized to minimize cross conduction
current during high speed operation.
Data Sheet
CC
to ground. Be aware that this capacitor is discharged before the IC is plugged into
CCH
“Application Circuit” on Page
Restart Timer
Undervoltage Lockout
Gate Drive
and switches the IC off when V
CC
is within the start up phase and ensures that the MOSFET
CC
and a storage capacitor which is connected from
11
21).
CC
is falling below the lower threshold V
Functional Description
CC
reaches the upper
CC
Rev.2, 2005-02
overvoltage
TDA4863
CCL
.