LB11650 - ON Semiconductor

Ordering number : EN7390
LB11650
Monolithic Digital IC
PWM Input Forward/Reverse
Motor Driver
http://onsemi.com
Overview
The LB11650 is a full bridge driver that supports switching between forward and reverse directions. It operates in one
of four modes under application control: forward, reverse, brake, and open. It also supports direct PWM control from
an external signal. The LB11650 is optimal for driving brush DC motors and bipolar stepping motors.
Features
 Supports PWM input
 Built-in high and low side diodes
 Simultaneous on state prevention function (prevents through currents)
 Built-in thermal shutdown circuit (latching type)
 High and low side short circuit protection function (latching type overcurrent protection)
 Externally controllable modes: forward, reverse, brake, open
 Standby mode function
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter
Symbol
Conditions
Ratings
unit
Motor supply voltage
VM max
30
Peak output current
IO PEAK
tW ≤ 10μs
2.0
V
A
Continuous output current
IO max
LVS pin
1.5
A
Logic system supply voltage
VCC max
Pd max
Independent IC
When mounted on a glass epoxy circuit board
(reference value) : 114.3 mm76.1 mm1.6 mm
7.0
V
Allowable power dissipation
3.5
W
Operating temperature
Topr
–20 to +85
C
Storage temperature
Tstg
–55 to +150
C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed,
damage may occur and reliability may be affected.
Package Dimensions
unit : mm
26.8
HEAT SPREADER
(20.0)
4.0
7.8
14.5MAX
1
(1.83)
5.2
4.6
7.0
(11.8)
(8.4)
(R1.7)
14
1.78
0.5
0.8
0.4
1.6
2.2
SIP14HZ
Semiconductor Components Industries, LLC, 2013
July, 2013
93003TN (OT) No.7390-1/6
LB11650
Recommended Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Motor supply voltage
VM
8 to 28
V
Logic system supply voltage
VCC
3.0 to 5.25
V
Logic input voltage range
VIN
–0.3 to VCC
V
Electrical Characteristics at Ta = 25°C, VM = 24 V, VCC = 5 V
Parameter
Symbol
Ratings
Conditions
min
typ
Unit
max
[Output Block]
Output stage supply current 1
IM ON
With no load, ST = high
Output stage supply current 2
IM wt
With no load, ST = low
0.84
1.2
1.56
mA
50
µA
Output saturation voltage 1
VO sat1
IO = +0.5 A, sink side
0.3
0.5
V
Output saturation voltage 2
VO sat2
IO = +1.0 A, sink side
0.5
0.7
V
Output saturation voltage 3
VO sat3
IO = –0.5 A, source side
1.5
1.8
V
Output saturation voltage 4
VO sat4
IO = –1.0 A, source side
1.7
2.0
V
50
µA
Output leakage current
IO leak
VO = VM, sink side
VO = 0 V, source side
–50
µA
[Logic Block]
ICC ON
Logic supply current
ICC BR
ICC OFF
ICC wt
Input voltage
Input current
VCC = 5 V, with the R pin open
BRAKE: LOW, PWM: HI, ST: HI
50
68
85
mA
VCC = 3.3 V, with the R pin shorted to VCC
BRAKE: LOW, PWM: HI, ST: HI
55
75
95
mA
BRAKE: HI, PWM: HI, ST: HI
3.4
4.7
6.0
mA
BRAKE: LOW, PWM: LOW, ST: HI
4.0
5.2
6.5
mA
50
µA
ST: LOW
VINH
2.0
V
VINL
IINH
VIN = 3.3 V
IINL
VIN = 0.8 V
C pin charge current
IC
C pin output off threshold voltage
Vtc
VC = 0 V
0.8
V
35
50
75
µA
5
10
13
µA
35
50
65
µA
1.17
1.3
1.43
V
VHS pin current detection
threshold voltage
VtVHS
VM – 0.55
VM – 0.5
VM – 0.45
V
VLS pin current detection
threshold voltage
VtVLS
0.45
0.5
0.55
V
Low voltage cutoff voltage
Low voltage cutoff hysteresis
Thermal shutdown temperature
VLVSD
2.25
2.5
2.75
V
VLVHYS
0.15
0.2
0.25
V
150
175
TTSD
Design target value*
°C
*: This is a design target value and is not measured.
Pd max — Ta
Allowable power dissipation, Pdmax — W
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
Specified circuit board: 114.3 × 76.1 × 1.6 mm
Glass epoxy resin
0
–20
0
20
40
60
Ambient temperature, Ta — °C
80 85
100
ILB01548
No. 7390-2/6
LB11650
Pin Assignment
11
12
13
14
OB
10
DiGND
C
9
R
ST
8
GND
7
BRAKE
6
PHASE
5
PWM
4
VCC
VLS
3
VHS
2
VM
1
OA
LB11650
Top view
Truth Table
PHASE
BRAKE
ST
PWM
OA
OB
H
L
H
H
H
L
L
L
H
H
L
H
X
L
H
L
OFF
OFF
X
H
H
X
H
H
X
X
L or OPEN
X
OFF
OFF
Operating mode
Forward
Reverse
Output off
Brake
Standby mode (circuits off)
X: H or L
Pin Functions
Pin No.
Pin
1
OA
Output
Pin function
14
OB
Output
4
VHS
High side current sensing (Insert an external resistor between VM and VHS. When the voltage across this resistor reaches 0.5 V,
the outputs are turned off.)
2
VLS
Low side current sensing (Insert an external resistor between VLS and ground. When the voltage across this resistor reaches
0.5 V, the outputs are turned off.)
7
C
Connection for an external filter capacitor that prevents incorrect operation of the current sensing output shutdown and thermal
shutdown circuits.
3
VM
Motor system power supply
5
VCC
Logic system power supply
9
PHASE
Forward/reverse switching pin
10
BRAKE
Brake control input. A high input switches the IC to brake mode.
6
ST
8
PWM
12
R
11
GND
13
DiGND
Standby mode control. The IC operates in standby mode when this pin is low or open.
PWM input. High: on
Low: off
Low side drive current switching. (Short R to VCC when VCC is 3.3 V, and leave R open when VCC = 5.0 V.)
Ground
Lower side regeneration diode ground connection
No. 7390-3/6
LB11650
High/Low Short Protection Function
This function turns the outputs off to prevent destruction of the IC if a problem such as an output pin being shorted to
VM or ground occurs and excessive current flows in the output transistors.
When an excessive current flows in an output transistor, a potential will occur across either the high side or the low side
current sense resistor. If that value exceeds the current detection threshold voltage, the capacitor connected to the C pin
starts to charge. Then, when the C pin voltage is charged to the output off threshold voltage, the output transistors are
turned off.
To restart the IC once it has gone to the output off state, either set the ST pin to the low level, or temporarily cut the VCC
power supply, and then reapply power.
The overcurrent detection current setting can be set to an arbitrary level with the resistor inserted between VM and VHS
for current flowing in the high side output transistor, and with the resistor inserted between VLS and ground for current
flowing in the low side output transistor.
When the resistor connected to VHS or VLS pin is R (Ω), the detected current I (A) will be as follows.
I (A) = 0.5 (V) / R (Ω)
For example, if R is 0.5 Ω, the detected current I will be 1 A.
This function is not an output current limiter function.
The detection current described above has the meaning that the short-circuit protection circuit begins to operate when a
current in excess of the detection current flows in the outputs. Therefore, if an output pin is shorted to VM or ground, the
maximum possible overcurrent that the output transistors are capable of will flow until the mask time set with the filter
circuit has elapsed. Designers must exert great care in designing the mask time setting.
Filter Circuit
To prevent the overcurrent protection and thermal shutdown circuits from operating incorrectly due to noise, the
LB11650 includes a circuit that sets a mask time so that when an abnormality is detected, it only turns the outputs off if
that state continues for a certain length of time.
When the capacitor connected between the C pin and ground is C (pF), the mask time T (µs) will be as follows.
T (µs) = 2.6 × 10–2 × C (pF)
For example, if C is 50 pF, the mask time T will be 1.3 µs.
Low Side Transistor Drive Current Switching Pin
Since the lower side output transistor drive current is created from VCC, if the VCC power supply level is reduced, the
drive current will also be reduced. Therefore, the LB11650 is provided with a pin for switching the drive current so that
the LB11650 can provide the same drive current when used with 3.3 V specifications as it does when used with 5 V
specifications.
When VCC = 5 V: Leave the R pin open.
When VCC = 3.3 V: Short the R pin to VCC.
No. 7390-4/6
LB11650
Block Diagram
M
VM 3
OA 1
14 OB
4 VHS
PWM
8
PHASE
9
BRAKE 10
ST
Control logic
circuit
6
R 12
13 DiGND
VCC = 5 V SW OPEN
VCC = 3.3 V SW ON
Latch
circuit
VCC
5
Thermal shutdown
circuit
UVLO
VREF
circuit
Filter
circuit
GND 11
C 7
2 VLS
No. 7390-5/6
LB11650
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PS No.7390-6/6