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參數(shù)資料
| 型號(hào)： | AMIS-39101 |
| 英文描述： | Octal High-Side Driver with Protection |
| 中文描述： | 八路高端驅(qū)動(dòng)器的保護(hù) |
| 文件頁(yè)數(shù)： | 8/15頁(yè) |
| 文件大小： | 413K |
| 代理商： | AMIS-39101 |
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AMIS-39101:
Octal High-Side Driver with Protection
Data Sheet
Table 8: Load Specific Characteristics
A. Inductive Load up to 350mH and T
ambient
up to 85°C
Symbol
Description
Maximum output per HS driver, all eight drivers might be active
simultaneously
B. Inductive Load up to 300mH and T
ambient
up to 85°C
Maximum output per HS driver, all eight drivers might be active
simultaneously
C. Resistive Load and T
ambient
up to 85°C
Maximum output per HS driver, all eight drivers might be active
simultaneously
Maximum output per one HS driver, only one can be active
Maximum output per HS driver, only two HS drivers from a different pair can
be active simultaneously
Maximum output per one HS driver pair
Note: 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 Table 8 cannot always be obtained. The practically obtainable maximum drive current heavily
depends on the thermal design of the application PCB (see Section 8.2).
The available power in the package is: (TSD_H - T_ambient) / Rthja
With TSD_H = 130°C and Rthja according to Table 5.
Min.
Max.
Unit
I_OUT_ON_max.
240
mA
I_OUT_ON_max.
275
mA
I_OUT_ON_max.
350
mA
650
mA
500
mA
830
mA
8.5 Charge Pump
The high-side drivers use floating NDMOS transistors as power devices
.
To provide the gate voltages for the NDMOS of the high-side
drivers, a charge pump is integrated. The storage capacitor is an external one. The charge pump oscillator has typical frequency of
4MHz.
8.6 Diagnostics
8.6.1. Short Circuit Diagnostics
The diagnostic circuit in the AMIS-39101 monitors the actual output status at the pins of the device and stores the result in the
diagnostic register which is then latched in the output register at the rising edge of the WR-pin. Each driver has its corresponding
diagnostic bit DIAG_x. By comparing the actual output status (DIAG_x) with the requested driver status (CMD_x) you can diagnose the
correct operation of the application according to Table 9.
8.6.2. Thermal Shutdown (TSD) Diagnostic
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 Table 9).
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.
Table 9: OUT Diagnostics
Requested Driver Status
CMD_x
Actual Output Status
DIAG_x
On
1
High
1
On
1
Low
0
Diagnosis
Normal state
Short to ground or TSD
(2)
Short to VS or missing load
(1)
or
TSD
Normal state
(1)
Off
0
High
1
Off
Notes:
0
Low
0
(1)
(2)
The correct diagnostic information is available after T_diagnostic_OFF time.
All 8 diagnostic bits DIAG_x must be in the fault condition to conclude a TSD diagnostic.
8
AMI Semiconductor
– November 06 - M-20638-001
www.amis.com
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