PT2466
1.8A Low-Voltage H-Bridge Driver
DESCRIPTION
The PT2466 provides an integrated motor driver for
cameras, consumer products, toys and other
application with low-voltage or battery-powered
motion control.
The PT2466 can supply up to 1.8A of output DC
current. It operates on a motor power supply (VM)
from 0 to 11V and a device power supply voltage
(VCC) of 1.8V to 5V.
Ultra- low r
ds-on
allows SOP-8 package available.
The PT2466 has a PWM (IN1-IN2) input interface
Full protections are integrated with over-current
protection, under-voltage lockout and over-
temperature shutdown.
FEATURE
H-Bridge Motor Driver
- DC Motor or Other Loads
- Low On-Resistance : HS+LS 280mΩ
1.8-A Maximum DC Drive Current
Separate Motor and Logic Supply
- Motor VM : 0 to 11V
- Logic VCC : 1.8V to 5V
Low-Power Sleep Mode
- 10nA with I
VM
and I
VCC
Small Package and Footprint
- 8-Pin DFN with Thermal PAD (2.0 X 2.0 mm)
- 8-Pin SOP
Protection Features
- VCC Under-voltage Lockout
- Over-Current Protection
- Thermal Shutdown
APPLICATION
Cameras
DSLR Lenses
Consumer Products
Toys
Robotics
BLOCK DIAGRAM
VM
(0V to 11V)
VM
VM
VCC
(1.8V to 5V)
VCC
Gate
Driver
UVLO
OCP
OUT1
IN1
Logic
VM
M
IN2
Gate
Driver
nSLEEP
OCP
OUT2
Over
Temp
GND
Figure 1. Function Block Diagram
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PT2466
APPLICATION CIRCUIT
VM
VCC
*C3
0.1uF
C1
2
OUT1
3
Thermal
Pad
1
VM
VCC
8
0.1uF
7
nSLEEP
6
C2
M
4
OUT2
IN1
GND
IN2
5
Figure 2. Schematic of Application
*C3 is optional for better performance. Details are referred to at the chapter
“Power Supply Recommendations”.
V1.0
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March 2017
PT2466
PIN DESCRIPTION
DFN-8
SOP-8
VM
1
8
VCC
VM
1
8
VCC
OUT1
2
Thermal
Pad
7
nSLEEP
OUT1
2
7
nSLEEP
OUT2
3
6
IN1
OUT2
3
6
IN1
GND
4
5
IN2
GND
4
5
IN2
Pin Name
VM
OUT1
OUT2
GND
IN2
IN1
nSLEEP
VCC
I/O
POWER
OUTPUT
OUTPUT
POWER
INPUT
INPUT
INPUT
POWER
Description
Motor power supply
Motor output 1
Motor output 2
Ground
Input 2
Input 1
Sleep mode input
Logic power supply
Pin No.
1
2
3
4
5
6
7
8
V1.0
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March 2017
PT2466
FUNCTION DESCRIPTION
BRIDGE CONTROL
The PT2466 is controlled using a PWM input interface, also called an IN-IN interface. Each output is controlled by a
corresponding input pin.
nSLEEP
IN1
IN2
OUT1
OUT2
Function (DC Motor)
0
1
1
1
1
X
0
0
1
1
X
0
1
0
1
Z
Z
L
H
L
Z
Z
H
L
L
Coast
Coast
Reverse
Forward
Brake
Table 1. Control Logic
PROTECTION MANAGEMENT
The PT2466 is fully protected against VCC under-voltage, overcurrent, and over-temperature events.
Fault
Condition
H-Bridge
Recovery
VCC under-voltage
Over-current
Thermal shutdown
VCC < 1.7V
IOUT > 1.9A (MIN)
TJ > 150℃ (MIN)
Disable
Disable
VCC>1.8V
tRETRY
TJ < 150℃
Disable
Table 2. Fault Behavior
FUNCTIONAL MODES
The PT2466 is active unless the nSLEEP pin is brought logic low. In sleep mode, the H-bridge FETs are disabled Hi-Z.
The PT2466 is brought out of sleep mode automatically if nSLEEP is brought logic high.
Mode
Condition
H-Bridge
Operating
Sleep mode
nSLEEP pin=1
nSLEEP pin=0
Operating
Disabled
Disabled
Fault encountered
Any fault condition met
Table 3. Operation Modes
V1.0
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March 2017
PT2466
POWER SUPPLY RECOMMENDATIONS
Having appropriate local bulk capacitance is an important factor in motor-drive system design. It is generally beneficial
to have more bulk capacitance.
The amount of local bulk capacitor needed depends on the following factors ,
The highest current required by the motor system.
The power-supply capacitance and ability to source current
The amount of parasitic inductance between the power supply and motor system
The acceptable voltage ripple
The type of motor used (brushed dc, brushless dc, stepper)
The motor braking method
The inductance between the power supply and motor drive system limits the rate at which current can change from the
power supply. If the local bulk capacitance is too small, the system responds to excessive current demands or dumps
from the motor with a change in voltage. When adequate bulk capacitance is used, the motor voltage remains stable
and high current can be quickly supplied.
The voltage rating for bulk capacitors should be higher than the operating voltage, to provide margin for cases when
the motor transfers energy to supply.
Parasitic Wire
Inductance
Power Supply
Motor Driver System
VM
Motor
Driver
GND
Local Bulk
Capacitor
IC Bypass
Capacitor
Figure 3. Motor Driver System with External Power Supply
PCB LAYOUT
The VM and VCC should be bypassed to GND using low-ESR ceramic capacitors with recommended value of 0.1µF.
These capacitors should be placed as close to the VM and VCC as possible with a thick trace or ground plane
connection to GND.
0.1uF
0.1uF
VM
1
8
VCC
OUT1
2
7
nSLEEP
OUT2
3
6
IN1
GND
4
5
IN2
Figure 4. Simplified Layout Example
V1.0
5
March 2017
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