Toshiba TC78B002FNG Bedienungsanleitung

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TC78B002FNG

2013-10-17

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.

Features

•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

TC78B002FNG

Weight: 0.07g (typ)

SSOP16-P-225-0.65B

TC78B002FNG

2013-10-17

Block Diagram (Application circuit)

5V Regulator

Control

Logic

Pre

Driver

TSD

Lock Protection

OSC

Hall

Ele.

OUT1

OUT2

RDO

GND

OSCR

VMI

VREG

7bit

A/D

VOFF

ISD

VSOFT

VSP

0.1uF

24kΩ

0.1μF

TC78B002FNG

2013-10-17

Pin Assignment

VMI

VOFF

VSOFT

9 VM

GND

VSP

FGOUT1

OUT2

OSCR

VREG

RDO

TC78B002FNG

2013-10-17

Pin Description

Pin No. Pin name Description

VREG

Output pin for reference voltage of 5 V

Hall signal input pin +

Hall signal input pin

－

OSCR

Connection pin for resistor of oscillation circuit

RDO

Output pin for lock detection

OUT1

Motor output pin 1

GND

Connection pin for ground

Connection pin for detecting resistor of output current

Power supply pin

OUT2

Motor output pin 2

Rotating output pin

VSP

Setting pin for output duty

VOFF

Setting pin for OFF term in switching conducting phase

Setting pin for lead angle

VMI

Setting pin for minimum output duty

VSOFT

Setting pin for soft switching term

TC78B002FNG

2013-10-17

Absolute Maximum Ratings (Ta = 25°C)

Characteristics Symbol Rating Unit

Power supply voltage VM 18 V

Input voltage VIN -0.3~6 (Note 1)

Output voltage VOUT 18 (Note 2)

Output current

OUT1,OUT2 IOUT 1.5 (Note 3)

VREG IOUT 10 mA

FG pin sink current IFG 10 mA

RDO pin sink current IRDO 10 mA

Power dissipation PD0.96 (Note 4)

Operating temperature Topr -40 to 105 °C

Storage temperature Tstg -55 to 150 °C

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

(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 Symbol Min Typ. Max Unit

Power supply voltage VMopr15.5 12 16 V

Power supply for low voltage

operation VMopr2 3.5 4.5 5.5 V

Internal oscillation frequency (Note 1) fOSC 8 10 12 MHz

PWM frequency fPWM 20 25 30 kHz

Input voltage (Note 2) VIN 0 VREG 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

0.2

0.4

0.6

0.8

1.2

025 50 75 100 125 150

(W)

Ta (℃)

(1)

(2)

TC78B002FNG

2013-10-17

Electrical Characteristics (Ta = 25°C and VM = 12 V, unless otherwise specified.)

Characteristics Symbol Test conditions Min Typ. Max Unit

Power supply current IVM VM =12 V, VREG =OPEN

Hall input=100Hz, output OPEN 3 5 mA

Hall signal

input

Common mode input voltage

range VCMRH 0 VREG

-1.5 V

Input voltage swing VH40 mV

Input current IH|VHP-VHM|≧100mV 1 μA

Hysteresis＋Voltage VHHYS+ (Design target value) (Note 1) 5 10 15 mV

Hysteresis－Voltage VHHYS-(Design target value) (Note 1) -15 -10 -5 mV

VREG pin voltage VREG VREG pin output source current=10mA 4.5 5.0 5.5 V

Maximum voltage of ADC convertor VADC (Design target value) (Note 1) VREG

-0.75 V

Output On Duty (Note 1)

Duty(20)

ROSC=24kΩ, output load:1kΩ

VSP=1.2V, VMI=0V or

VMI=1.2V, VSP=0V

15 20 25 %

Duty(50)

ROSC=24kΩ, output load:1kΩ

VSP=2.2V, VMI=0V or

VMI=2.2V, VSP=0V

43 50 57 %

Duty(80)

ROSC=24kΩ, output load:1kΩ

VSP=3.2V, VMI=0V or

VMI=3.2V, VSP=0V

70 80 90 %

VSP threshold

VAD (L) Threshold voltage of stopping output 0.5 0.55 

VAD (H) Threshold voltage of full output 3.9 4.3

VSP response time TVSP (Design target value) (Note 1) 10 ms

Internal oscillation frequency fOSC ROSC=24kΩ

Measured by internal divided frequency 8 10 12 MHz

PWM frequency fPWM ROSC=24kΩ 20 25 30 kHz

Pin input current IIN VSP,VMI,VSOFT,VOFF, and LA pins

input voltage 0~VREG 1 μA

Output ON resistance Ron(H+L) IOUT = 0.2A 1.6 2.5 Ω

Soft switching time (Note 1)

TSOFT(0) ROSC=24kΩ, Hall input=100Hz

VOFF=0V , VSOFT=0V

0

TSOFT(45) ROSC=24kΩ, Hall input=100Hz

VOFF=0V , VSOFT=VREG*0.45 43 47

TSOFT(90) ROSC=24kΩ, Hall input=100Hz

VOFF=0V , VSOFT= VREG 84 90

OFF term

(Note 1)

TOFF(0) ROSC=24kΩ, Hall input=100Hz

VSOFT=0V, VOFF=0V

0

TOFF(45) ROSC=24kΩ, Hall input=100Hz

VSOFT=0V, VOFF= VREG*0.45 43 47

TOFF(90) ROSC=24kΩ, Hall input=100Hz

VSOFT=0V, VOFF= VREG 84 90

Lead angle correction

(Note 1)

TLA(0) ROSC=24kΩ, Hall input=100Hz

LA=0V

0

TLA(11.25) ROSC=24kΩ, Hall input=100Hz

LA= VREG*0.23 10 12

TLA(22.5) ROSC=24kΩ, Hall input=100Hz

LA= VREG 21 24

TC78B002FNG

2013-10-17

Characteristics Symbol Test conditions Min Typ. Max Unit

RDO

Output low voltage VOUT(L) IFG/RDO=5mA 0.3 V

Output leakage current IOUT(H) VFG/RDO=5V 1 μA

Current limit detecting voltage for RS pin VRS 0.27 0.3 0.33 V

Masking time of current limit detection Tmask (Design target value) (Note 1) 1.2 1.5 1.8 μs

Operating current of over current protection ILIM (Design target value) (Note 1) 2.5 A

Masking time of over current protection TISDMASK (Design target value) (Note 1) 2 μs

OFF time of over current protection TISDOFF (Design target value) (Note 1) 100 ms

Operating temperature of thermal shutdown

circuit TSD Junction temperature

(Design target value) (Note 1)

170 ℃

Hysteresis of thermal shutdown circuit ΔTSD (Design target value) (Note 1) 40 ℃

ON time of lock detection TON ROSC=24kΩ

(Design target value) (Note 1) 0.32 0.4 0.48 s

OFF time of lock detection TOFF ROSC=24kΩ

(Design target value) (Note 1) 3.2 4 4.8 s

Detecting voltage for low voltage

VUVLO Operation voltage

(Design target value) (Note 1) 2.6 2.9 3.2 V

VPORRL Recovery voltage

(Design target value) (Note 1) 2.9 3.2 3.5 V

Output switching characteristics

tr(Design target value) (Note 1) 100 

tf(Design target value) (Note 1) 100 

Note 1: Pre-shipment testing is not performed.

TC78B002FNG

2013-10-17

Reference Data

Fig.1 Power supply current

Fig.2 Hall input Hysteresis voltage

Fig.3 VREG pin voltage (VM=12V)

Fig.4 VREG pin voltage (Ta=25℃)

Fig.5 Output ON resistance (VM=12V)

Fig.6 Output ON resistance ( Ta = 2 5 ℃)

-20

-10

36912 15 18

Hall input hysteresis voltage. VHHYS [mV]

Supply voltage. VM[V]

125℃

25℃

-40℃

Operation Voltage Range

-40℃

25℃

125℃

4.6

4.7

4.8

4.9

0246810

VREG output voltage. VREG[V]

Output Current. I

VREG

[mA]

125℃

25℃

-40℃

0 2 4 6 8 10

VREG output voltage. VREG[V]

Output Current. I

VREG

[mA]

18V

12V

3.5V

00.3 0.6 0.9 1.2 1.5

Ouput ON resistance.RON(H+L) [Ω]

Output Current. IOUT[A]

125℃

25℃

-40℃

00.3 0.6 0.9 1.2 1.5

Ouput ON resistance.RON(H+L) [Ω]

Output Current. I

OUT

[A]

3.5V

12V

3 6 9 12 15 18

Power supply current. I

[mA]

Supply voltage. VM[V]

125℃

25℃

-40℃

Operation Voltage Range

TC78B002FNG

2013-10-17

Fig.7 FG/RDO pin Output low voltage (VM=12V)

Fig.8 FG/RDO pin Output low voltage (Ta=25℃)

Fig.9 Internal oscillation frequency

Fig.10 Current limit detecting voltage for RS pin

0.2

0.4

0.6

0.8

0 2 4 6 8 10

FG low voltage. V

OUT(L)

[V]

Output Current. I

FG/RDO

[mA]

125℃

25℃

-40℃

0.2

0.4

0.6

0.8

0 2 4 6 8 10

FG low voltage. VOUT(L)[V]

Output Current. IFG/RDO[mA]

3.5V

12V

36912 15 18

Internaloscillation frequency. fOSC [MHz]

Supply voltage. VM[V]

125℃

25℃

-40℃

Operation Voltage Range

0.28

0.29

0.3

0.31

0.32

36912 15 18

Current limit detecting voltage

. V

[V]

Supply voltage. VM[V]

125℃

25℃

-40℃

Operation Voltage Range

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