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參數(shù)資料
| 型號(hào)： | MPC17550EVEL |
| 廠商： | 飛思卡爾半導(dǎo)體(中國(guó))有限公司 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Quad H-Bridge Micromotor Driver with DC/DC Boost Converter |
| 中文描述： | 四H橋直流微電機(jī)驅(qū)動(dòng)器/ DC升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大小： | 212K |
| 代理商： | MPC17550EVEL |
Analog Integrated Circuit Device Data
Freescale Semiconductor
9
17550
FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 17550 is a monolithic quad H-Bridge ideal for portable
electronic applications containing multiple bipolar stepper
motors and / or brush DC motors. The device features an on-
board DC DC converter to provide gate-drive voltages, as
well as level-shifting circuitry. The control logic translates the
input signals to the gate-driver circuitry while providing cross-
conduction suppression.
The 17550 has four operating modes: Forward, Reverse,
Brake, and Tri-Stated (High Impedance). The MOSFETs
comprising the output bridge have a total source + sink
R
DS(ON)
≤
1.2
.
The 17550 can simultaneously drive four brush DC motors
or two bipolar stepper motors. The drivers are designed to be
PWM’ed at frequencies up to 200 kHz.
FUNCTIONAL TERMINAL DESCRIPTION
LOGIC SUPPLY (VDD)
The VDD
terminal carries the logic supply voltage and
current into the logic sections of the IC. V
DD
has an
undervoltage threshold. If the supply voltage drops below the
undervoltage threshold, the output power stage switches to a
tri-state condition. When the supply voltage returns to a level
that is above the threshold, the power stage automatically
resumes normal operation according to the established
condition of the input control terminals.
CONTROL SIGNAL INPUT FOR H-BRIDGE,
F=FORWARD, R= REVERSE (INAF, INAR, INBF,
INBR, INCF, INCR, INDF, INDR)
These logic input control terminals control each H-Bridge
output; e.g., IN*F logic HIGH = HB*F HIGH; likewise, IN*R
logic HIGH = HB*R HIGH. However, if both “F” and “R” inputs
are taken HIGH, the associated bridge’s outputs are both tri-
stated (refer to
Table 5, Truth Table
, page
8
).
OUTPUT ENABLE (OE)
OE
terminal is a LOW = TRUE enable input. When
OE
= HIGH, all H-Bridge outputs are tri-stated (high
impedance) regardless of logic inputs states.
OUTPUT OF H-BRIDGE, R=REVERSE,
F=FORWARD (HBAF, HBAR, HBBF, HBBR, HBCF,
HBCR, HBDF, HBDR)
These terminals provide connection to the outputs of each
of the internal H-Bridges (see
Figure 2, 17550 Simplified
Internal Block Diagram
, page
2
).
POWER SUPPLY VOLTAGE CONNECTION FOR
MOTORS A, B, C, D (VMA, VMB, VMC, VMD)
The VM terminals carry the main supply voltage and
current into the power sections of the 17550. This supply then
becomes controlled and/or modulated by the 17550 as it
delivers the power to the loads attached between the
H-Bridge output terminals. All VM terminals must be
connected together on the printed circuit board.
DC/ DC CONVERTER SWITCHING TRANSISTOR
OUTPUT (LX)
The LX terminal is the open-drain output of the internal
DC / DC converter circuit. It is the junction for the external
inductor and the anode of the external Schottky diode.
GATE-DRIVER CIRCUIT POWER SUPPLY (VG)
The VG terminal is the input terminal for the gate-drive
voltage. It can be supplied from the built-in DC DC converter
or from an external source.
GROUND TERMINALS (GND, AGND, PGND)
All ground terminals must be tied together on the PCB.
POWER STANDBY MODE CONTROL (PSB)
The PSB input controls the functioning of power output
stages (the H-Bridges). When this input signal turns Low, the
output stages and Internal DC/DC Converter which makes
Gate Voltage are disabled and all the outputs are opened
(High Impedance). When this input signal turns High, the
output stages and Internal DC/DC Converter are enabled and
the H-Bridges operate normally.
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