參數(shù)資料
型號(hào)： MC34920
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 2.8 Ohm(Typ) Quad H-Bridge Motor Driver(2.8歐（典型值）四H橋電機(jī)驅(qū)動(dòng)器)
中文描述： 2.8歐姆（典型值）四H橋電機(jī)驅(qū)動(dòng)器（2.8歐（典型值）四魔橋電機(jī)驅(qū)動(dòng)器）
文件頁數(shù)： 25/28頁
文件大?。?/td> 813K
代理商： MC34920
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
34920
25
Environmental Specifications
Ambient Temperature and Relative Humidity
Table 9
lists the temperature and relative humidity for
operating and storage conditions for the 34920.
ESD Immunity
Refer to the Maximum Ratings table,
page 5
.
Overtemperature Protection
The 34920 implements overtemperature detection and
shutdown functions. The overtemperature circuitry monitors the
device’s internal temperature and activates thermal shutdown
circuitry when the temperature exceeds T
J(SHUTDOWN)
(155°C
minimum, 175°C maximum). The thermal shutdown condition is
maintained until the die temperature falls below T
J(ENABLE)
(135°C minimum, 155°C maximum). Each voltage regulator
and motor driver circuit has its own individual shutdown circuit.
APPLICATIONS
Logic Voltage (V
CC
) and Reset Interoperability
The 3.3 V or 5.0 V V
V1
output voltage should feed back to the
V
CC
input terminal directly (see
Figure 7
) to ensure that the
34920 can be properly reset during a power-down situation. If
this typology is not the one implemented, the user needs to be
aware that the V
CC
terminal is not monitored for undervoltage.
Only the V1_FB and VB+ terminals are monitored for
undervoltage. Thus, it is possible for V
CC
to be under voltage
without the 34920 issuing a reset.
Figure 7. Voltage Regulator Functions
Table 9. Ambient Temperature and Humidity
Condition
Temperature (°C)
% Relative Humidity
Operating
0 to 70
8.0 to 80
Storage
-40 to 150
5.0 to 80
V1 Regulator
V2 Regulator
ENABLE
Oscillator
V
b
Generator
V
VB+
(21 V to 42 V)
CP2
CP1
V
b
10 nF 50 V
22
μ
F 25 V
V
V2
34920
V2_FB
V2_SWITCH
V
V1
V1_FB
V1_SWITCH
VB+
Oscillator
V
VB+
(21 V to 42 V)
V
CC
VB+
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
n
.
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