AMIS39100PNPB3RG Datasheet, PDF (7/12 Pages) ON Semiconductor – Octal High Side Driver with Protection

AMIS−39100
LOAD SPECIFIC PARAMETERS
HS driver parameters for specific loads are specified in following categories:
A. Parameters for inductive loads till 350 mH and T_A till 105°C
B. Parameters for inductive loads till 300 mH and T_A till 105°C
C. Parameters for resistive loads and T_A till 85°C
Table 8. LOAD SPECIFIC CHARACTERISTICS
Symbol
Description
Min
Max
Unit
A. INDUCTIVE LOAD TILL 350 mH AND T_A TILL 1055C
I_OUT_ON_max
Maximum output per HS driver, all eight drivers might be active simultan-
eously
240
mA
B. INDUCTIVE LOAD TILL 300 mH AND T_A TILL 1055C
I_OUT_ON_max
Maximum output per HS driver, all eight drivers might be active
simultaneously
275
mA
C. RESISTIVE LOAD AND T_A TILL 855C
I_OUT_ON_max
Maximum output per HS driver, all eight drivers might be active simultan-
eously
350
mA
Maximum output per one HS driver, only one can be active
650
mA
Maximum output per HS driver, only two HS drivers from a different pair
can be active simultaneously
500
mA
Maximum output per one HS driver pair
830
mA
10. The parameters above are not tested in production but are guaranteed by design. The overall current capability limitations need to be
respected at all times.
The maximum current specified in cannot always be result in the diagnostic register which is then latched in the
obtained. The practically obtainable maximum drive current output register at the rising edge of the WR−pin. Each driver
heavily depends on the thermal design of the application has its corresponding diagnostic bit DIAG_x. By comparing
PCB (see Section “Thermal Characteristics”).
the actual output status (DIAG_x) with the requested driver
The available power in the package is: (TSD_H − T_A) /
R_thja
status (CMD_x) you can diagnose the correct operation of
the application according to .
With TSD_H = 130°C and R_thja according to Table 4.
Thermal Shutdown (TSD) Diagnostic
CHARGE PUMP
The HS drivers use floating NDMOS transistors as power
devices. To provide the gate voltages for the NDMOS of the
HS drivers, a charge pump is integrated. The storage
capacitor is an external one. The charge pump oscillator has
typical frequency of 4 MHz.
In case of TSD activation, all bits DIAG 1 to DIAG 8 in
the SPI output register are set into the fault state and all
drivers will be switched off (see ).
The TSD error condition is active until it is reset by the
next correct communication on SPI interface (i.e. number of
clock pulses during WR=0 is divisible by 8), provided that
the device has cooled down under the TSD trip point.
DIAGNOSTICS
Short−Circuit Diagnostics
The diagnostic circuit in the AMIS−39100 monitors the
actual output status at the pins of the device and stores the
Table 9. OUT DIAGNOSTICS
Requested driver status CMD_x Actual output status DIAG_x
Diagnosis
On
1
High
1
Normal State
On
1
Low
0
Short−to−Ground or TSD (Note 12)
Off
0
High
1
Short−to−VB or Missing Load (Note 11) or TSD
(Note 12)
Off
0
Low
0
Normal State (Note 11)
11. The correct diagnostic information is available after T_diagnostic_OFF time.
12. All 8 diagnostic bits DIAG_x must be in the fault condition to conclude a TSD diagnostic.
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