TC78B002FNG
TOSHIBA CMOS Integrated Circuit
Silicon Monolithic
TC78B002FNG
Single Phase Full-wave Driver for Fan Motor
TC78B002FNG is a single phase full-wave driver for fan motor. It
has a DMOS device in an output transistor.
A highly effective drive is possible by adopting a DMOS output driver
with low ON resistance and a PWM drive system.
TC78B002FNG
Features
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Single-phase full-wave drive
Motor power supply voltage: VM =16V (maximum operating range)
Output current: Iout = 1.5A (max.)
PWM control
Built-in oscillation circuit (External resistor)
Soft switching drive
Lock protection, Automatic recovery
Quick start
Built in hall bias
Rotation Speed Detection (FG) and Lock Detection (RDO) Output
Current limit function
Built in over current protection
Built in thermal shut down circuit
SSOP16-P-225-0.65B
Weight: 0.07g (typ)
1
2013-10-17
TC78B002FNG
Block Diagram (Application circuit)
VM
VREG
0.1μF
0.1uF
5V Regulator
Hall
Ele.
HP
ISD
HM
VSOFT
VOFF
7bit
A/D
Control
Logic
OUT1
Pre
Driver
M
OUT2
LA
VMI
VSP
OSCR
24kΩ
TSD
FG
RDO
OSC
Lock Protection
GND
RS
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2013-10-17
TC78B002FNG
Pin Assignment
VREG
HP
HM
OSCR
RDO
OUT1
GND
RS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VSOFT
VMI
LA
VOFF
VSP
FG
OUT2
VM
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2013-10-17
TC78B002FNG
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin name
VREG
HP
HM
OSCR
RDO
OUT1
GND
RS
VM
OUT2
FG
VSP
VOFF
LA
VMI
VSOFT
Description
Output pin for reference voltage of 5 V
Hall signal input pin +
Hall signal input pin－
Connection pin for resistor of oscillation circuit
Output pin for lock detection
Motor output pin 1
Connection pin for ground
Connection pin for detecting resistor of output current
Power supply pin
Motor output pin 2
Rotating output pin
Setting pin for output duty
Setting pin for OFF term in switching conducting phase
Setting pin for lead angle
Setting pin for minimum output duty
Setting pin for soft switching term
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2013-10-17
TC78B002FNG
Absolute Maximum Ratings
(Ta = 25°C)
Characteristics
Power supply voltage
Input voltage
Output voltage
Output current
FG pin sink current
RDO pin sink current
Power dissipation
Operating temperature
Storage temperature
OUT1,OUT2
VREG
Symbol
VM
V
IN
V
OUT
I
OUT
I
OUT
I
FG
I
RDO
P
D
T
opr
T
stg
Rating
18
-0.3~6
18
1.5
10
10
10
0.96
(Note 4)
(Note 1)
(Note 2)
(Note 3)
Unit
V
V
V
A
mA
mA
mA
W
°C
°C
-40 to 105
-55 to 150
Note: The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded, even for a
moment. Do not exceed any of these ratings. Exceeding the rating (s) may cause the device breakdown, damage or
deterioration, and may result injury by explosion or combustion. Please use the IC within the specified operating ranges.
Note 1: VMI, VSP, VSOFT, VOFF, and LA pins
Note 2: OUT1, OUT2, FG and RDO pins
Note 3: Power dissipation must not be exceed
Note 4: Mounted on a glass epoxy board
Package Power Dissipation
P
D
(W)
1.2
1
0.8
0.6
0.4
0.2
0
0
25
50
75
100
125
150
(1)
(2)
Ta (℃)
(1) When mounted on the board (40mm×30mm×1.6mm 2 layers, FR-4 board) Rth(j-a)=130℃/W
(2) IC only Rth(j-a)=400℃/W
Operating Ranges
(Ta = 25°C)
Characteristics
Power supply voltage
Power supply for low voltage
operation
Internal oscillation frequency (Note 1)
PWM frequency
Input voltage (Note 2)
Symbol
VM
opr1
VM
opr2
f
OSC
f
PWM
V
IN
Min
5.5
3.5
8
20
0
Typ.
12
4.5
10
25
Max
16
5.5
12
30
V
REG
Unit
V
V
MHz
kHz
V
Note 1: In low-voltage operation, operation with frequency more than 10MHz is not covered under guarantee.
Note 2: VMI, VSOFT, VOFF, and LA pins
5
2013-10-17
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