ISL78022_14 Datasheet, PDF (16/19 Pages) Intersil Corporation – Automotive Grade TFT-LCD DC/DC with Integrated Amplifiers

ISL78020, ISL78022
TFT-LCD backplane (V_COM) or the gamma-correction
divider string. They feature rail-to-rail input and output
capability, they are unity gain stable, and have low power
consumption (typical 600µA per amplifier). The ISL78020
and ISL78022 have a -3dB bandwidth of 12MHz while
maintaining a 10V/µs slew rate.
Short Circuit Current Limit
The ISL78020 and ISL78022 will limit the short circuit
current to ±180mA if the output is directly shorted to the
positive or the negative supply. If an output is shorted for a
long time, the junction temperature will trigger the
Over-Temperature Protection limit and hence the part will
shut down.
V_CDEL
IN
V_REF
V_BOOST
V_OFF
t_ON
t_DEL1
t_DEL2
V_ON
V_{ON SLICE} CIRCUIT
NOTE: Not to scale
t_DEL3
START-UP SEQUENCE
TIMED BY C_DEL
FIGURE 22. START-UP SEQUENCE
NORMAL
FAULT
OPERATION PRESENT
16
FN6386.3
December 23, 2013