AAT4901IJS-1-T1中文资料_数据手册_规格书

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

General Description

Features

•

The AAT4901 FastSwitch™ is a member of AnalogicTech’s

Application Specific Power MOSFET™ (ASPM™) product

family. It is a full-bridge buffered power stage operating

with an input voltage range of 2.0V to 5.5V. The device

is designed to operate with a switching frequency of up

to 2MHz, minimizing the cost and size of external com-

ponents. The AAT4901 is protected from shoot-through

current by integrated break-before-make circuitry. The

drivers can be independently controlled and their propa-

gation delay, from input to output, is typically between

8ns-19ns dependent upon logic option.

V_INRange: 2.0V–5.5V

R_DS(ON)

ꢀ High-side 220mΩ

ꢀ Low-side 160mΩ

Break-Before-Make Shoot–Through Protection

4 Options

ꢀ Single Control Input with Enable

• Two Logic Versions

ꢀ Dual Control Input with Brake Function

ꢀ Dual Half-bridge

Low Quiescent Current:

ꢀ 10µA (max) DC

ꢀ 4mA (max) at 1MHz

:

•

Four options are offered providing a single input control,

dual input control or as two independent half-bridges.

•

-40°C to +85°C Temperature Range

SC70JW-8 Package

Other features include low R_DS(ON)and low quiescent cur-

rent allowing for high efficiency performance.

Applications

ꢀ DC Motor Drive

The AAT4901 is available in the space-saving, Pb-free

8-pin SC70JW package and is rated over the -40°C to

+85°C temperature range.

ꢀ Door Locks

ꢀ Dual Low-Side MOSFET Gate Driver

ꢀ Fan Motors

ꢀ High Frequency DC/DC Converters

ꢀ High Speed Line Drive

ꢀ Proximity Detectors

Typical Applications

IN

C_IN

OUTA

AAT4901-1

ENA

OUTB

ENB

GND

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PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Pin Descriptions

Symbol

Pin #

-1, -2, -4

-3

Function

1

2

3

ENA

IN

ENB

Active high enable signal.

Supply voltage input; input voltage range from 2.0V to 5.5V.

Active high enable signal.

4901-1/-2/-4: No connection.

4901-3: Active high enable signal.

4

N/C

ENC

5

6

7

GND

OUTB

OUTA

Ground connection

Output of half-bridge B. Connect to load.

Output of half-bridge A. Connect to load.

4901-1/-2/-4: No connection.

4901-3: Active high enable signal.

8

N/C

END

Pin Configuration

SC70JW-8

(Top View)

8

7

6

5

8

7

6

5

1

N/C

END

ENA

IN

ENB

ENC

2

3

4

IN

ENB

N/C

OUTA

OUTB

GND

OUTA

OUTB

GND

3

4

AAT4901-1/-2/-4

AAT4901-3

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4901.2008.03.1.0

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Absolute Maximum Ratings¹

Symbol

Description

Value

Units

V_IN

V_EN

V_OUT

I_MAX

I_MAX(PK)

T_LEAD

IN to GND

ENA, ENB, ENC, END to GND

OUT to GND

Maximum Continuous Switch Current

Maximum Peak Current

Maximum Soldering Temperature (at Leads)

-0.3 to 6.0

-0.3 to V_IN+ 0.3

V

A

0.7

3

300

°C

Thermal Information

Symbol

Description

Value

Units

P_D

Θ_JA

T_J

Maximum Power Dissipation (T_A= 25°C)

Thermal Resistance²

Operating Junction Temperature Range

440

225

-40 to 150

mW

°C/W

°C

1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions

specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.

2. Mounted on a FR4 board.

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PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Electrical Characteristics¹

V_IN= 5V, T_A= -40 to 85°C unless otherwise noted. Typical values are at T_A=25°C.

Symbol Description

Conditions

Min

Typ

Max

Units

V_IN

Operation Voltage

2.0

5.5

V

AAT4901-1

AAT4901-2

AAT4901-3

AAT4901-4

AAT4901-1

AAT4901-2

AAT4901-3

AAT4901-4

3.8

2.0

0.72

0.9

IN = 5V, ENB (D) = IN,

ENA = 1MHz, I_OUT= 0

I_QAC

AC Quiescent Current

4.0

mA

µA

IN = 5V, ENB (D) = IN,

ENA (C) = GND, I_OUT= 0

I_QDC

DC Quiescent Current

5.5

10.0

ENB (D) = ENA (C) = GND, IN = OUT

= 5.5V

ENB (D) = GND, IN = 5.5V, V_OUT= 0, or

OUT = IN

I_Q(OFF)

Off-Supply Current

Off-Switch Current

1.0

1

µA

I_SD(OFF)

0.03

V_IN= 4.5V

V_IN= 3.0V

V_IN= 2.0V

V_IN= 4.5V

V_IN= 3.0V

V_IN= 2.0V

220

250

340

160

180

240

R_DS(ON)H

High Side MOSFET On-Resistance

Low Side MOSFET On-Resistance

mΩ

R_DS(ON)L

V_ONL

V_ONH

V_HYS

I_SINK

ENA (C), ENB (D) Input Low Voltage

ENA (C), ENB (D) Input High Voltage

ENA (C), ENB (D) Input Hysteresis

ENA (C), ENB (D) Input Leakage

0.2 · V_IN

1.0

V

µA

ns

0.5 · V_IN

0.15 · V_IN

0.01

5.0

15

ENA (C) , ENB (D) = 5.5V

ENA (C) Rising

ENA (C) Falling

T_BBM

Break-Before-Make Time

AAT4901-1

AAT4901-2

AAT4901-3

AAT4901-4

AAT4901-1

AAT4901-2

AAT4901-3

AAT4901-4

AAT4901-1

AAT4901-2

AAT4901-3

15

8

14

18

15

7

19

12

10

12

11

10

7

ENA (C) Rising

ns

T_ON-DLY

ENA (C) to OUT Delay

ENA (C) Falling

ENA (C) = GND

AAT4901-4

AAT4901-1

AAT4901-2

T_HIZ

ENB to OUT HiZ Delay

ENA (C) = IN

AAT4901-3

AAT4901-4

12

1. The AAT4901 is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range and is assured by design, characterization, and correla-

tion with statistical process controls.

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4901.2008.03.1.0

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Typical Characteristics

AC Quiescent Current vs. Input Voltage

(ENB = IN; ENA = 1MHz; I_OUT= 0; T_A= 25°C)

(ENA = ENB = 1MHz; I_OUT= 0; T_A= 25°C)

1.5

1.2

0.9

0.6

0.3

0

4

3.5

3

2.5

2

1.5

1

2

2.5

3

3.5

4

4.5

5

5.5

2

2.5

3

3.5

4

4.5

5

5.5

Input Voltage (V)

AC Quiescent Current vs. Switching Frequency

(ENB = IN; ENA = 0.1kHz~2000kHz; I_OUT= 0, T_A= 25°C)

(ENA = ENB = 0.1kHz~2000kHz; I_OUT= 0, T_A= 25°C)

10

1

0.1

0.01

V_IN= 5.0V

V_IN= 3.0V

0.001

0.1

1

10

100

1000

10000

0.1

1

10

100

1000

10000

Switching Frequency (kHz)

AC Quiescent Current vs. Temperature

DC Quiescent Current vs. Temperature

(ENA = ENB = 1MHz; I_OUT= 0)

(ENB = IN; ENA = GND; I_OUT= 0)

8

7

6

5

4

3

2

1

0

4

3

2

1

0

V_IN= 5.0V

V_IN= 3.0V

V_IN= 5.0V

V_IN= 3.0V

-40

-15

10

35

60

85

-40

-15

10

35

60

85

Temperature (°C)

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PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Typical Characteristics

Low Side R_DS(ON)vs. Output Current

High Side R_DS(ON)vs. Output Current

(T_A= 25°C)

300

250

200

150

350

300

250

200

150

100

50

100

V_IN= 2.0V

V_IN= 3.0V

V_IN= 4.5V

V_IN= 2.0V

V_IN= 3.0V

V_IN= 4.5V

50

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.1

0.2

0.3

0.4

0.5

0.6

0.7

Output Current (A)

Low Side R_DS(ON)vs. Temperature

High Side R_DS(ON)vs. Temperature

(I_OUT= 0.7A)

350

400

350

300

250

200

150

100

50

300

250

200

150

100

50

V_IN= 2.0V

V_IN= 3.0V

V_IN= 4.5V

V_IN= 2.0V

V_IN= 3.0V

V_IN= 4.5V

0

-40

-15

10

35

60

85

-40

-15

10

35

60

85

Temperature (°C)

MOSFETs R_DS(ON)vs. Input Voltage

ENA/ENB Threshold vs. Input Voltage

(I_OUT= 0.7A; T_A= 25°C)

(T_A= 25°C)

2.4

2

350

300

250

200

150

100

50

1.6

1.2

0.8

0.4

V_{ON_H}

V_{ON_L}

High Side

Low Side

0

2

2.5

3

3.5

4

4.5

5

5.5

2

2.5

3

3.5

4

4.5

5

5.5

Input Voltage (V)

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4901.2008.03.1.0

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Functional Block Diagram

IN

OUTA

OUTB

ENA

ENB

ENC

Control Logic

GND

END

AAT4901-3 Only

switching speed up to 2MHz. The enable input (EN), when

driven low, turns off the driver and reduces the operating

current to less than 1μA. Logic options allow the AAT4901

to be used as a small DC motor driver with break function,

a solenoid driver, a dual-low-side MOSFET driver, or as a

coil driver. Applications include motor drive, proximity

detectors, electronic locks, and DC-DC converters.

Functional Description

The AAT4901 is a buffered full-bridge driver IC with

options to allow the device to function as two independent

half-bridges. The output stage is capable of driving output

loads of up to 0.7A and features break-before-make tim-

ing and very fast propagation delay time, allowing high

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PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Options

AAT4901-1/-4 Logic Table

AAT4901-1

-1

-4

H-bridge configuration with two enables. Enable B is

active high and enables the H-bridge output. Enable A

toggles the H-bridge outputs A and B in anti-phase. In

steady state, this can provide forward/reverse motor

drive signals.

ENA

ENB

ENA

ENB

OUTA

OUTB

0

1

0

1

0

1

0

1

0

1

0

1

Hi Z

IN

Hi Z

GND

IN

GND

AAT4901-2

AAT4901-2 Logic Table

H-bridge configuration with two enables. Enable A and

Enable B are in anti-phase and provide forward/reverse

and braking.

ENA

ENB

OUTA

OUTB

0

1

0

1

0

1

Hi Z

IN

GND

IN

Hi Z

GND

IN

AAT4901-3

IN

Dual independent half-bridge configuration with four

enables. Function similar to 2 x AAT4900.

AAT4901-3 Logic Table

AAT4901-4

ENA/C

ENB/D

OUTA/B

H-bridge with two enables. Enable A and Enable B are in

anti-phase and toggle the H-bridge outputs A and B in

anti-phase respectively. In steady state, this can provide

forward/reverse motor drive signals to adjust the motor

speed by various duty cycles.

0

1

0

1

0

1

Hi Z

IN

GND

Timing Diagram

TON-DLY-F

V_ENA

50%

TON-DLY-R

90%

(OFF)

V_OUTA

10%

Hi Z

TON-DLY-R

50%

TON-DLY-F

50%

V_ENB

50%

90%

(OFF)

Hi Z

(OFF)

Hi Z

V_OUTB

10%

TON-DLY-F

TON-DLY-R

THIZ_GND

THIZ_IN

Figure 1: AAT4901-4 Timing Diagram.

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PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Where:

Application Information

T_J(MAX)= junction temperature of the dice (°C).

T_A= ambient temperature (°C).

Input Supply Capacitor

θ_JA= thermal resistance (225°C/W).

I_QAC= AC quiescent current of the driver (mA).

Q_G(tot)= total gate charge of external low side MOSFETs

(nC).

The input capacitor provides a low impedance loop for

the edges of pulsed current drawn by the AAT4901 and

reduces the surge current drawn from the input power.

A 4.7μF to 10μF X7R or X5R low ESR/ESL ceramic capac-

itor is selected for the input supply decoupling. To mini-

mize the tray resistance, the capacitor should be placed

as closely as possible to the input pin. This keeps the

high frequency content of input current localized, mini-

mizing EMI and input voltage ripple.

F_SW= switching frequency (MHz).

The maximum junction temperature for the SC70JW-8

package can be derived from Equation 1:

Eq. 2:

T_J(MAX)= P_D(MAX)· θ_JA+ T_A

Shoot-Through Protection

For example, if the AAT4901 drives 2 AAT9560 MOSFETs

whose maximum gate charge is specified as 13nC for

V_GATE= 5V, the total power dissipation in the driver at a

switching frequency of 1MHz equals:

The internal high-side and low-side MOSFETs of the

AAT4901 cannot conduct at the same time to prevent

shoot-through current. When the high-side MOSFET

turns on, the low-side MOSFET turns off first; after 5ns

break-before-make time, the high-side MOSFET then

turns on. Similarly, before the low-side MOSFET turns

on, the high-side MOSFET turns off; after a certain

break-before-make time (5ns typ.), the low-side MOSFET

turns on. The dead time between the high-side and low-

side turn-on should be kept as low as possible to mini-

mize current flows through the body diode of the high-

side and/or low-side MOSFET(s). The break-before-make

shoot-through protection significantly reduces losses

associated with the driver at high frequency.

P_D(tot)= 2 · (5V · 13nC · 1MHz) + 5V · 4.0mA = 150mW

Gate Drive Current Ratings

Assuming that the maximum gate charge of the dual

low-side MOSFETs are equal, the maximum gate drive

capability for the designed maximum junction tempera-

ture without an external resistor can be derived from

Equation 1:

1

T_J(MAX)- T_A

θ_JA· V_IN

Thermal Calculations

Eq. 3: Q_G(MAX)

=

·

- I_QAC

2 · F_SW

In the dual low-side MOSFET driver application, the

power dissipation of the AAT4901 includes the power

dissipation in the MOSFETs due to charging and dis-

charging the gate capacitance, the AC quiescent current

power dissipation, and transient power in the driver dur-

ing output transitions. As the transient power is usually

very small, its losses can be ignored. Maximum package

power dissipation can be estimated by the following

equation:

The relationship between gate capacitance, turn-on/

turn-off time, and the MOSFET driver current rating can

be determined by:

dV

dt

Eq. 4:

I_G(MAX)= C_G(MAX)

·

Where:

I_G(MAX)= peak drive current for a given voltage

C_G(MAX)= maximum gate capacitance

dV = MOSFET gate-to-source voltage

T_J(MAX)- T_A

P_D(MAX)= V_CC· I_IN=

Eq. 1:

θ_JA

dt = rising time of MOSFET gate-to-source voltage

= I_QAC· V_CC+ Q_G(tot)F_SW· V_CC

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PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

The relationship between C_G(MAX), Q_G(MAX), and V_GATEis

given by:

Typical Applications

2-Phase Synchronous Buck Converter

Q_G(MAX)

V_GATE

Eq. 5:

C_G(MAX)

=

The most common AAT4901 applications include multi-

phase DC/DC converter output power stages, DC motor

drive, a dual low-side MOSFET driver, and a 3-state high-

speed high-current line driver.

The peak current drive requirements for a given MOSFET

gate voltage can be derived from Equations 4 and 5:

Figure 2 shows a typical configuration when used as a

2-phase buck converter power stage with synchronous

rectification. The EN pin can be used to force outputs

OUTA/OUTB to a high impedance state; this allows the

output inductor to operate in discontinuous condition

mode (DCM) and improves efficiency under light load

conditions. The body diode associated with the low-side

switching device gives the AAT4901 inductive switching

capability, and clamps the LX node at one diode drop

below GND during the break-before-make time. The

multiphase buck converter assures a stable, high-perfor-

mance topology for high currents and low voltages which

are demanded in computers, workstation, telecom and

datacom servers. Figure 3 illustrates output ripple cur-

rent reduction due to 2-phase cancellation.

Q_G(MAX)

I

=

Eq. 6:

G(MAX)

dt

Design Example

V_IN= 5V

V_GATE= 5V

F_SW= 1MHz

θ_JA= 225°C/W

I_QAC= 4.0mA

T_J(MAX)= 120°C

T_A= 85°C

t_RISE= dt = 10ns

1

120°C - 85°C

225°C/W · 5V

⎛

⎝

⎞

⎠

Q_G(MAX)

=

·

- 4.0mA = 13.6nC

2 · 1MHz

Motor Drive

The AAT4901 is ideally suited for use as an efficient out-

put driver for DC brushless motor control due to its full

bridge output stage with integrated MOSFETs. The induc-

tive load switching capability of the AAT4901 eliminates

the need for external diodes during commutation time.

In applications where rotation is always in the same

direction, a single half-bridge AAT4900 can be used to

drive a DC motor. If needed to control the rotation in

both directions, full-bridge motor control circuits can be

applied as shown in Figure 4. In this configuration the

motor can be controlled to run clockwise, counter-clock-

wise, stop rapidly (“regeneration” braking) or free run

(coast) to a stop.

Q_G(MAX)13.6nC

=

C_G(MAX)

=

= 2.7nF

= 1.36A

V_GATE

5V

Q_G(MAX)13.6nC

=

I_G(MAX)

dt

10ns

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4901.2008.03.1.0

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

On/Off(EN)

V_IN: 2.0V ~ 5.5V

1

8

7

6

5

VCC

PWM1

SW1

ENA

END

OUTA

OUTB

GND

L1

IL1

IL2

2

IN

V_OUT

IL1 + IL2

C_O

2-Phase

DC/DC

Controller

C_IN

AAT4901-3

3

GND

FB

PWM2

SW2

ENB

L2

4

ENC

R1

R2

Figure 2: AAT4901 in 2-Phase Synchronous Buck Converter Power Stage.

OUTA

OUTB

IL2

IL1

IL1+IL2

Figure 3: Output Current Ripple Reduction (IL1+IL2) due to 2-Phase Cancellation.

When the voltage applied between the DC motor by the

input(s) logic control is reversed, it could change the

rotation direction. When both outputs (OUTA/OUTB) are

floating, the motor winding acts as a regeneration; the

current inside the motor winding would continue to flow

into the input capacitor through the internal MOSFET

parasitic diode and decay to zero rapidly, stopping the

motor rapidly. When both outputs are connected to the

input supply (or ground) simultaneously, the motor

coasts and the winding current decays slowly due to the

winding resistor until the motor free runs to a stop.

A better method is to switch the motor’s supply on and off

rapidly. If the switching is fast enough, the motor doesn’t

notice it, it only notices the average effect. The time it

takes a motor to speed up and slow down under switching

conditions is dependent on the inertia of the rotor (basi-

cally how heavy it is) and the amount of friction and load

torque. Figure 5 shows the speed of a motor that is being

turned on and off at a fairly low switching frequency. The

average speed is around 150, although it varies quite a

bit. If the supply voltage is switched quickly enough, the

motor will not have time to change speed much and the

speed will be quite steady. When the duty cycle (D =

T_ON/T) is increased, the average speed of the motor

increases. Thus the speed is controlled by the duty cycle

of the PWM (Pulse Width Modulation).

The speed of a DC motor is directly proportional to the

supply voltage. It can be controlled by simply adjusting

the voltage sent to the motor, but this is quite inefficient.

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PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

V

_IN: 2.0~5.5V

V_IN: 2.0~5.5V

1

2

3

4

8

7

6

5

CLK/DIR

1

2

3

4

8

CLK/DIR

Brake

ENA

IN

N/C

OUTA

OUTB

GND

ENA

N/C

OUTA

OUTB

GND

7

6

5

IN

M

AAT4901-1

AAT4901-2

EN

CLK/DIR

Brake

ENB

N/C

ENB

N/C

C1

4.7µF/16V

C1

4.7µF/16V

V_IN: 2.0~5.5V

V

_IN: 2.0~5.5V

EN

1

2

3

4

8

7

6

5

CLK/DIR

1

8

ENA

IN

END

OUTA

OUTB

GND

ENA

IN

N/C

OUTA

OUTB

GND

2

3

4

7

6

5

M

AAT4901-3

AAT4901-4

ENB

ENC

ENB

N/C

C1

4.7µF/16V

C1

4.7µF/16V

Figure 4: Full-Bridge Motor Driver Using AAT4901.

200

20

15

Motor Speed

150

100

50

10

Supply Voltage

5

0

Ton

0

T

Time

Figure 5: Motor Speed vs. Supply Voltage.

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4901.2008.03.1.0

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

The minimum switching frequency is chosen based on

motor characteristics (the equivalent inductance and the

parasitic series resistor) and the percentage of current

variation to the average current specified. The minimum

switching frequency is in direct proportion to the para-

sitic series resister, and in inverse proportion to the

equivalent inductance and allowable current ripple.

There is also a diode connected in reverse across the field

winding, to absorb the current in the field winding when

all four MOSFETs in the bridge are turned off.

During period (A), to make the motor run forwards, Q4

is turned on, and Q1 has the PWM signal applied to it.

The current path is shown in blue in Figure 7. At period

(B) Q4 is kept on, so when the Q1 PWM signal is off, cur-

rent can continue to flow around the bottom loop through

Q3’s parasitic diode. At period (C), to make the motor

run backwards or control the speed, Q3 is turned on, and

Q2 has the PWM signal applied to it. At period (D), Q3 is

kept on, so when the Q2 PWM signal is off, current can

continue to flow around the bottom loop through Q4’s

parasitic diode. At period (E), when the motor is running

forwards for example, the motor is now acting as a gen-

erator and forcing current through its armature, through

Q2’s diode, through the battery (thereby charging the

battery) and back through Q3’s diode.

When driving a high-voltage DC motor, external high-

voltage MOSFETs are needed to commutate the motor.

In this application, the AAT4901 can be configured as a

double-ended gate driver, as illustrated in Figure 6.

The full-bridge power stage operates the motor drive con-

trol as shown in Figure 7. Each side of the motor can be

connected either to the battery's positive terminal or to

the battery's negative terminal through the switch. Note

that only one MOSFET on each side of the motor may be

turned on at any one time; otherwise the high-side and

low-side MOSFETs will short out the battery and burn out.

High-Voltage

Rail

V_IN: 5.0V

1

8

7

CLK1

ENA

N/C(END)

2

to Motor

IN

OUTA

AAT4901-1,-2,-4

(-3)

3

4

6

5

CLK2

C1

ENB

OUTB

GND

N/C(ENC)

4.7µF/16V

Figure 6: Double-Ended Gate Driver.

w w w . a n a l o g i c t e c h . c o m

4901.2008.03.1.0

13

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

V_BAT

+

V_BAT

+

Lf

Field winding

Q1

Q3

Q2

Ia

Q1

Q3

Q2

Ia

La

Q4

armature

V_BAT

-

V_BAT

-

Period (A)

Period (B)

V_BAT

+

V_BAT

+

Lf

Field winding

Q1

Q3

Q2

Ia

Q1

Q3

Q2

Ia

La

Q4

armature

V_BAT

-

V_BAT

-

Period (D)

Period (C)

V_BAT

+

Lf

Field winding

Q1

Q3

Q2

Ia

La

Q4

armature

V_BAT

-

Period (E)

Figure 7: Full-Bridge Motor Drive Control.

Dual Channel, High Speed,

Dual Low-Side MOSFET Driver

High Current 3-State Line Driver

The AAT4901-3 is also ideally suited for dual low-side

MOSFET driver applications due to its dual independent

half-bridge output configuration. It can be used in a

push-pull topology as illustrated in Figure 9 or in other

applications which require the ability to drive the

MOSFETs quickly, due to the AAT4901's extremely low

R_DS(ON)(220/160mΩ typ.) and very fast propagation time

(20ns typ.)

The AAT4901-3 is ideally suited for dual channel, high

speed, high current 3-state line driver applications such

as CCD clock drivers. The low quiescent power dissipa-

tion makes this part attractive in battery powered prod-

ucts. The 3A peak drive capability also makes the

AAT4901-3 an excellent choice for driving high speed

capacitive lines. The 20ns fast switching/delay time

allows clocking speeds up to 10MHz.

w w w . a n a l o g i c t e c h . c o m

14

4901.2008.03.1.0

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

ENA

ENB

IN

OUTA

3-State

ENC

END

OUTB

GND

Figure 8: AAT4901-3 Dual Channel High-Speed High-Current 3-State Line Driver.

V_OUT

V_IN

+

V_CC: 5.0V

EN

PWM A

1

8

ENA

IN

END

OUTA

OUTB

GND

2

3

7

6

AAT4901-3

ENB

ENC

PWM B

4

5

C1

4.7µF/16V

Figure 9: Push-Pull Topology MOSFET Driver with AAT4901.

w w w . a n a l o g i c t e c h . c o m

4901.2008.03.1.0

15

PRODUCT DATASHEET

AAT4901

TM

FastSwitch

Buffered Power Full-Bridge

Ordering Information

Package

Marking¹

Part Number (Tape and Reel)²

SC70JW-8

XXGYY

2SGYY

AAT4901IJS-1-T1

AAT4901IJS-2-T1

AAT4901IJS-3-T1

AAT4901IJS-4-T1

All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor

products that are in compliance with current RoHS standards, including the requirement that lead not exceed

0.1% by weight in homogeneous materials. For more information, please visit our website at

http://www.analogictech.com/about/quality.aspx.

Package Information

SC70JW-8

0.50 BSC 0.50 BSC 0.50 BSC

0.225 0.075

2.00 0.20

0.048REF

0.100

0.45 0.10

4° 4°

7° 3°

2.10 0.30

All measurements in millimeters.

1. XXGYY: XX denotes Device code, G denotes assembly code, and YY denotes date code.

2. Sample stock is generally held on part numbers listed in BOLD.

Advanced Analogic Technologies, Inc.

3230 Scott Boulevard, Santa Clara, CA 95054

Phone (408) 737-4600

Fax (408) 737-4611

AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual

property rights are implied. AnalogicTech reserves the right to make changes to their products or speciﬁcations or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and

conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties

relating to ﬁtness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate

design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to

support this warranty. Speciﬁc testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other

brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.

w w w . a n a l o g i c t e c h . c o m

16

4901.2008.03.1.0

型号	制造商	描述	价格	文档
AAT4901IJS-2-T1	ANALOGICTECH	Buffered Power Full-Bridge	获取价格
AAT4901IJS-3-T1	ANALOGICTECH	Buffered Power Full-Bridge	获取价格
AAT4901IJS-4-T1	ANALOGICTECH	Buffered Power Full-Bridge	获取价格
AAT4902IUR-T1	SKYWORKS	Brushless DC Motor Controller	获取价格
AAT4910IJS-T1	SKYWORKS	Half Bridge Based MOSFET Driver	获取价格
AAT4910IJS-T1	ANALOGICTECH	Interface Circuit	获取价格
AAT5101	SKYWORKS	2.5W Mono Filter-Free Class D Audio Power Amplifier	获取价格
AAT5101IUR-T1	SKYWORKS	2.5W Mono Filter-Free Class D Audio Power Amplifier	获取价格
AAT5102IUN-T1	SKYWORKS	Audio Amplifier,	获取价格
AAT5102IVN-T1	SKYWORKS	Audio Amplifier,	获取价格

AAT4901IJS-1-T1

AAT4901IJS-1-T1 概述

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