MLX83202 Datasheet, PDF (14/35 Pages) Melexis Microelectronic Systems – Automotive NFET pre-drivers

8 Description
8.1 Supply system
MLX83202/MLX83203
Automotive NFET pre-drivers
Figure 6. Supply system, CPMODE=0
Figure 7. Supply system, CPMODE=1
The supply for the IC operation is supplied via VSUP and VDD:
 VDD supplies the IO’s, and the amplifier.
o Mind when supplying VDD with a limited output impedance (for instance from a
microcontroller IO) that the performance of the amplifier may be affected.
 VSUP supplies the internal operation and the charge pump.
See also chapter: 8.8 Charge pump.
8.2 Sleep mode
Sleep mode is activated when the supply input VDD is pulled below VDDsleepL.
In sleep mode the current consumption on VSUP is reduced to Issleep.
Pin
State in sleep mode
FETTX, FETBX,
EN, VREF, ICOM
ISENSE
VREG
VBOOST, HSD
CP
CPX
GATETX
PHASEX
GATEBX
Input pins, supplied from VDD.
Supplied from VDD
Supply regulator is disabled
Externally connected to supply
Charge pump is disabled
Any charge that remains after VREG is disabled will leak to ground
VSUP>4.5V
In sleep mode gate-discharge-resistors (Rsgd) between GATETX and PHASEX
are activated (see chapter 8.7.2 FET driver during sleep mode)
VSUP>4.5V
In sleep mode gate-discharge-resistors (Rsgd) between GATEBX and DGND
are activated. (see chapter 8.7.2 FET driver during sleep mode)
Table 4. State of IC during sleep mode
Input/Output
GND
GND
GND
~VBAT
GND
GND
GND
GND
3901083203
Rev 2.2
Page 14 of 35
Prelim. Data Sheet
4 Dec 2013