Toshiba TB9051FTG User manual

TB9051FTG
©2016-2019
Toshiba Electronic Devices & Storage Corporation Ver.1.1 2019-03-14
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Toshiba Bi-CMOS Linear Integrated Circuit Silicon Monolithic
TB9051FTG
PWM type single channel H-Bridge DC brushed motor driver for automotive use
1. Outline
This product is a motor driver IC which incorporates the output driver
for the direct drive of a DC brushed motor intended for the automotive
use.
The motor drive output can be highly efficient operation by the PWM
control which realizes low-on resistance.
Forward / Reverse / brake mode can be selected according to PWM1 signal and PWM2 signal, and the
motor operation mode and stop mode can be selected by ENABLE pin.
Moreover, the output current capacity is 5A (max), it is suitable for various automotive applications
such as a throttle and valve control, various engine bulbs, storing of door mirrors, and a seat
positioning.
2. Application
Automotive applications such as a throttle and valve control, various engine bulbs, and storing of door
mirrors
3. Feature
●Motordriverblock: Single channel H-Bridge driver
(Ron(Pch+Nch))<0.45Ω(Max @Tj = 150°C, VBAT = 8 V)
●Abnormality detection function: Over-current detection, over-temperature detection, VBAT
undervoltage detection, VCC undervoltage detection, and
VCC high voltage detection
●Built-in initial diagnosis function: Power supply abnormality detection circuit (VBAT
undervoltage, VCC undervoltage and VCC high voltage.)
●Output type: PWM control output
●Motor operation: Forward /Reverse/ Brake
●Current limitation control: Current limiter with chopper type
●Output high-side current monitoring function (OCM pin)
●DIAG output
●Built-in the through current prevention circuit
●Operating voltage range: VBAT = 4.5 to 28 V (Maximum ratings of power supply
voltage 40V (max): 0.5 sec.)
●Operating temperature range: Ta = -40°C to 125°C
●Compact type flat package: P-QFN28-0606-0.65-001
●AEC-Q100 Qualified
・If the label of shipping box is indicated to be “[[G]]/RoHS COMPATIBLE2”, “[[G]]/RoHS [[Chemical
symbol(s) of controlled substance(s)”, and “RoHS COMPATIBLE” or “RoHS COMPATIBLE, [[Chemical
symbol(s) of controlled substance(s)]]>MCV”, this product is compliant with the EU RoHS Directive
(2011 / 65 / EU) in the meaning of the statement.
P-QFN28-0606-0.65-001

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4. Block Diagram
Figure 4.1 Block diagram
Note: Some of the functional blocks, circuits in the block diagram may be omitted or simplified for
explanatory purposes.
The signal which is performed the logical operation of the EN and ENB pin input, is not connected
to each driver output circuit. However, each EN and ENB signal is connected independently to the
output circuit of each driver.
Control
・Over current detection
・POR
・Low voltage detection
・High voltage detection
・Thermal detection Pre-Driver
Over-temperature
detection
Over current
detection
Hi-side current
monitoring
VBAT
OUT1
OUT2
PGND
AGND
PWM2
PWM1
EN
ENB
M
Battery
Microcontroller
5V ECU
VCC
DIAG
OSC circuit
OCC
OCM
EN circuit
5.1kΩ
Low voltage
detection
Initial
diagnosis
Low voltage
detection, and high
voltage detection
Initial
diagnosis
POR

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5. Pin Assignment
Pin assignment (Top View)
Figure 5.1 Pin assignment

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6. Pin Description
Pin description
Table 6 Pin description
Pin
No. Pin name Pin description
1 OCC
Motor drive output control pin at the time of the over-current detection (This
pin is used for the judgement of whether the motor control output is ON or
OFF by this IC or by the MCU.)
2 VCC 5V power supply pin. This pin is used for internal logic and analog circuit.
3 ENB Inverted input pin of driver operation permission
4 AGND Ground pin for analog and digital circuit
5 EN Input pin of driver operation permission
7 OCM Current monitoring pin at High-side. This pin can monitor the current which
flows from the voltage generated to an external resistor into the H-side.
8 PWM1 Driver control signal input pin 1
9 PWM2 Driver control signal input pin 2
11, 12,
24, 25 VBAT Battery power supply
13, 14 OUT1 H-bridge driver output pin 1
15, 16, 17,
19, 20, 21 PGND Power ground pin (used as the ground of H-bridge)
18 DIAG Diagnostic signal output pin
Open drain type of output pin
22, 23 OUT2 H-bridge driver output pin 2
27 TEST1 Test pin This pin should be used connecting to GND.
28 TEST2 Test pin This pin should be used connecting to GND.
6, 10, 26 NC This pin should be used open.
C1 CORNER1
These pins are connected to E-Pad.
C2 CORNER2
C3 CORNER3
C4 CORNER4
- E-Pad This pin is used for a heat dissipation.
* The CORNER1 to 4, and E-Pad pins should be used connecting to GND. In addition, these pins are not
tested for a shipment.

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6.1. Protection Element Arrangement
Table 6.1 Protection element arrangement
Pin Name
Pull down
I/O
Max
rating Protection element Protection element
connection destination
/Pull up [V]
Power
supply
side
GND side
Power
supply
side
GND side
OCC Pull down I 6 - B - AGND
ENB Pull up I 6 - B - AGND
EN Pull down I 6 - B - AGND
PWM1 Pull down I 6 - B - AGND
PWM2 Pull down I 6 - B - AGND
OUT1 - O 40 - - - -
OUT2 - O 40 - - - -
DIAG - O 6 - - - -
OCM - O 6 C B VCC AGND
TEST1 Pull down I 6 - B - AGND
TEST2 Pull down I 6 - B - AGND
VBAT -
Power
supply 40 - A - AGND/PGND
VCC -
Power
supply 6 - B - AGND/PGND
NC - - - - - - -
PGND - GND - - D - AGND
AGND - GND - - D - PGND
Figure 6.1 Protection element type
40V PDMOS Vdss
NMOS保護 PMOS保護 PN Diode(5V)
ABCD
NMOS protection PMOS protection

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7. Functional Description
7.1. Motor Driver Output Circuit
The output circuit operates according to the following function (Table 7.1-1). In the Table 7.1-1 to 7.1-3,
each letter means; X: Don’t care, H: High, L: Low, and Z: High impedance.
Table 7.1-1 Motor function
PWM1 PWM2 EN ENB DIAG pin OUT1 OUT2
Forward H L H L H H L
Short brake L L H L H L L
Reverse L H H L H L H
Short brake H H H L H L L
EN Disable X X L X L Z Z
ENB Disable X X X H L Z Z
EN Disconnected X X Z X L Z Z
ENB Disconnected X X X Z L Z Z
PWM1 Disconnected Z L/H H L H L L/H
PWM2 Disconnected L/H Z H L H L/H L
Note 1: When the motor is set to the reverse from the forward, or to the forward from the reverse, be sure
to perform after setting the brake between them. Otherwise the IC may be broken.
Note 2: In the current limitation control, the operation is different from the above table of the motor
function. For details, refer to current limitation control (Section 7.3).
Table 7.1-2 Function operation at abnormality detection
PWM1 PWM2 EN ENB DIAG pin OUT1 OUT2
Over-temperature detection
(Note)
Output is OFF regardless of input signals.
L Z Z
Over-current detection (Note) L Z Z
VBAT undervoltage detection L Z Z
VCC undervoltage detection L Z Z
VCC high voltage detection L Z Z
Note: When the voltage is dropping less than the VBAT undervoltage, the over-temperature detection
circuit holds the state before detecting VBAT. When the voltage is dropping less than the VBAT
undervoltage, the Over-current detection circuit is forced to be undetected state.
Table 7.1-3 Output state
OUT High-side Driver Low-Side Driver
H ON OFF
L OFF ON
High-Z OFF OFF

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(1) PWM function (in the case of Forward) (EN:H, ENB:L)
* The mark of a circle shows DMOS Tr which is ON.
Figure 7.1-1 Current flow at the time of PWM function (Forward)
Note: Some of the functional blocks and circuits in the block diagram may be omitted or simplified for
explanatory purposes.
●PWM function (Forward) timing chart (in the case of short brake operation, PWM1 = PWM2 = L)
*D.T (Dead Time): In order to prevent the through current by simultaneous ON of Hi-side Pch Tr and
Lo-side Nch Tr, Pch Tr off and Nch Tr off time (4 μs (typ.)) are prepared.
Figure 7.1-2 (1) Timing chart at the time of PWM function (Forward)
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes.

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●PWM function (Foward) timing chart (in the case of short brake operation, PWM1 = PWM2 = H)
*D.T (Dead Time): In order to prevent the through current by simultaneous ON of Hi-side Pch Tr and
Lo-side Nch Tr, Pch Tr off and Nch Tr off time (4 μs (typ.)) are prepared.
Figure 7.1-2 (2) Timing chart at the time of PWM function (Forward)
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes.

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(2) PWM function (in the case of Reverse) (EN:H, ENB:L)
* The mark of a circle shows DMOS Tr which is ON.
Figure 7.1-3 Current flow at the time of PWM function (Reverese)
Note: Some of the functional blocks and circuits in the block diagram may be omitted or simplified for
explanatory purposes.
●PWM function (Reverse) timing chart (in the case of short brake operation, PWM1 = PWM2 = L)
*D.T (Dead Time): In order to prevent the through current by simultaneous ON of Hi-side Pch Tr and
Lo-side Nch Tr, Pch Tr off and Nch Tr off time (4 μs (typ.)) are prepared.
Figure 7.1-4 (1) Timing chart at the time of PWM function (Reverse)
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes
.
H
L
PWM2
H
L
Pch
ON
OFF
Nch
ON
OFF
Pch
ON
OFF
Nch
ON
OFF
Reverse D.T Short brake D.T Reverse
Dead
Time
Dead
Time
O
U
T
1
O
U
T
2
PWM1

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●PWM function (Reverse) timing chart (in the case of short brake function, PWM1 = PWM2 = H)
*D.T (Dead Time): In order to prevent the through current by simultaneous ON of Hi-side Pch Tr and
Lo-side Nch Tr, Pch Tr off and Nch Tr off time (4 μs (typ.)) are prepared.
Figure 7.1-4 (2) Timing chart at the time of PWM function (Reverse)
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes