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TD62708N
8CH HIGH CURRENT SOURCE DRIVER
TOSHIBA TD62708N
TOSHIBA BIPOLAR DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC
TD62708N
8CH HIGH CURRENT SOURCE DRIVER
The TD62708N is comprised of eight source current
output stages and ENABLE inputs which can gate the
outputs.
TD62708N features a large output source current of 1.8A
and minimized output voltage change vs output current
change. These features make the device optimum for
driving the matrix of ink jet printer print heads, LEDs,
and the scan side of resistor matrixes.
Before using this device, note the thermal conditions for
usage.
FEATURES SDIPZ4-P-300-1.78
0 Input terminal : High active Weight : 1.2g (Typ.)
o -tn-afilTs terminal : Low input output active mode
0 Output current : IOUT=1.8A (MAX)
0 A little change of output voltage
: AVOH1§0.45V
(at IOH = 0.18A-1.44A)
Package type : DIP24N
Input compatible with TTL, 5V CMOS
PIN CONNECTION (TOP VIEW)
Vcty E 1 V 24 ]m
GNDI: 2 23 lvc
IN1 C 3 22 ]0UT1
lN2 C a 21 Jour2
IN3 L 5 20 Jour?
ME 6 TD62708N19JOUT4
INS L 7 18 Jours
IN6[ 8 17 Jours
IN7[ 9 16 Jour?
|Na[ 10 15 ]oura
GND[ 11 14 lvc
VCC2 L 12 13 ]Nc
961001EBA2
O TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general can
malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing
TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss
of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent products specifications Also, please keep in mind the precautions and conditions set forth in the
TOSHIBA Semiconductor Reliability Handbook.
1998-05-15 1/8
TOSHIBA TD62708N
SCHEMATICS (EACH DRIVER)
V (*1) V
ff.2Al', C FUNCTION
IN ENABLE OUT
Vcc1 H L ON
(*2) L L OFF
OUT Don't Care H OFF
ENABLE
(*1) For normal use, connect VCC2 and Vc.
For applications whose thermal conditions are more demanding, TOSHIBA
recommends an external resistor (REXT : approx. 0.90/2W) be connected between
VCCZ and Vc.
(*2) When connecting an external resistor between BVCCZ and Vc, to avoid parasitic sub
currents, set the voltage between Vc and OUT as 0.3V or more.
Set the external resistor value so that the voltage between Vc and OUT is 0.3V or
more at the maximum temperature of the operating temperature range.
INPUT CIRCUIT : IN, ENABLE
Vcc1 C
7: kg (Note) Since the states of the input pins (pins 3 to 10)
IN tp-tart M "k are the same as those at high-level input, set
ENABLE " the pins for unused channels to GND.
GND OJ
2928-- I
2878-1. ' I'-..
28'7". f,rsss, i "Tj--125oc
'fi" 28.55--;': ,,'
O 28.2-- I I
> 2805-- l "ss,,.,' "Tj--250C
E Vcc2=30-4V I "Tj--ooc
g: l AVCE‘:5.8mVI°c l,
I I l I l I I I I I
I I I I I I I I I I
0 0.18 0.36 0.54 0.72 0.90 1.08 1.26 1.44 1.62 1.80
IoH(A)
0 Output voltage (Temperature characteristic)
Output Voltage(V0H) has a Temperature Characteristic of 5.8mV/°C, care must be taken
to keep Junction Temp(Tj) within safety Limits.
961001EBA2'
O The products described in this document are subject to foreign exchange and foreign trade control laws.
0 The information contained herein is presented only as a guide for the apflications of our products. No responsibility is assumed by TOSHIBA
CORPORATION for any infringements of intellectual property or other rights D the third parties which may result from its use. No license is granted
b implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others.
0 T e information contained herein is subject to change without notice.
1998-05-15 2/8
TOSHIBA
TD62708N
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage 1 VCC1 -0.5--7.0 V
Supply Voltage 2 VCC2 -0.5--40
Output Current IOUT 1.8 (Note) A
Input Voltage VIN - 0.5--7.0 V
Input Current 'IN $4.0 mA
Power Dissipation PD 1.78 W
Janction Temperature Tj 150 °C
Operating Temperature Top, -40--85 "C
Storage Temperature Tstg - 55--150 "C
(Note 1)
(Note 2)
derate to 14.2mW/°C.
RECOMMENDED OPERATING CONDITIONS
1.8A /ch (32ps, Duty: 76%), Each Channel should not be switched on at same
When mounting the device on the PC board, and the temperature exceeds 25°C,
CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT
Supply Voltage 1 VCC1 - 4.5 5.0 5.5 V
Supply Voltage 2 VCC2 - - - 30
Output Current IOH (Note) - - - 1.44 A
VIN (H) V|N=H, Vcc1=5.0V 2.4 - VCC V
V L V = L, V = 5.0V 0 - 0.4 V
Input Voltage IN( ) IN CC1
VEN (H) VEN = H, Vcc1= 5.0V 2.4 - VCC V
VEN (L) VEN = L, Van: 5.0V 0 - 0.4 V
Operating Temperature Topr - 0 - 70 °C
(Note) Each Channel should not be switched on at same time.
1998-05-15 3/8
TOSHIBA TD62708N
ELECTRICAL CHARACTERISTICS (Ta = 0--70''C)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
IL1 VCC1=7-0VI IN=L, EN=H - - 100
Leakage Current IL2 - VCC2 = 30V, IN = L, EN = H - - 100 pA
IL3 Vc=30V, IN=L, EN=H - - 100
IIN1 VCC1=5.0V, V|N=5.0V - 0 10 PA
I V =5.0V, V =0V 0.55 0.8 1.1 mA
Input Current lN2 - CC1 IN
IEN'I Vcc1= 5.0V, VEN = 5.0V - 0 10 pr/i
IEN2 Vcc1= 5.0V, VEN = 0V 0.55 0.8 1.1 mA
VINH vccr= 5.0V 2.0 + 0.4
VINL VCC1= 5.0V - 0 4 - 0.8
Input Voltage - . V
V V = . V 2. -
ENH CCI 5 0 0 + 0.4
VENL VCC1 = 5.0V GND - 0.8
vom 10H =1.44A 27.0 27.5 -
Output Voltage VOH2 IOH = 0.18A VCC2 30V 27.5 28.0 -
Change Of Output . 0
Voltage AVOH1 - VOHI- VOH2 (Tj - 25 C) - 0.3 0.45 V
Output Voltage .- o .- o
Temperature AVCEZ - IVOHJI)‘ 113135 C) VOH (T1 =25 C) - 0.5 - V
Characteristic OH-- .
tme IOUT=0.18A - 0.1 1.0
Propagation Delay tpLH2 VCC1 = VIN = 4.5V IQUT =1.44A - 0.2 1.0
Time tpHL1 - VCC2=30V IOUT=0.18A - 1.0 3.5
tpHL2 IOUT=1.44A - 1.5 3.5 #5
I = .1 A - . .
Rise Time trl OUT 0 8 0 05 0 5
tr2 VCC1=V|N=4-5V IOUT=1.44A - 0.1 0.5
t - v = v I = .1 A - . 2.
Fall Time fl CC2 30 OUT 0 8 0 3 0
tfit IOUT =1.44A - 0.3 2.0
AC TEST CIRCUIT
1iirira
tpLH tpHL
90% 90%
OUTPUT
#/0% \r&
1998-05-15 4/8
TOSHIBA
|cc1 (0N)
CURRENT DISSIPATION
OUTPUT CURRENT
|cc1(0N) - Vcc1
V|N=VCC1
1ch ON
4.5 5.0 5.5 6.0
SUPPLY VOLTAGE Vcc1 (V)
IOH - VOH
Ta = 85°C Ta = 25°C
VIN = Vcc1= 4.5V
VCC2 = 30V
1.0 2.0 3.0 4.0 5.0
OUTPUT VOLTAGE VOH (V)
Iccz (0N) (mA)
CURRENT DISSIPATION
POWER DISSIPATION PD (W)
TD62708N
Iccz (ON) - We
V|N1=VCC1= 5.5V
Ich ON
SUPPLY VOLTAGE 2
20 25 30
VCC2 (V)
100 125 150
AMBIENT TEMPERATURE Ta (°C)
1998-05-15 5/8
TOSHIBA TD62708N
0 Thermal calculation
Where, power dissipation =(Vcc1xlcc1)+(Vcc2 x 'CC2 x ch x Duty) + (VOH x 'OH x ch x Duty)
and the transient thermal resistance of DIP24N (R+h)=70°C/W, the junction temperature (Tj) is :
Tj (MAX) 2 (PD X R + h) + Ta (MAX) ......... expression (A)
Conditions : Vcc1=5V (Icc1=approx. 8mA), Vccz=30V (lcc2 =approx. 5mA), 1ch on
VOH =approx. 2.0V, IOH =1.44A,
Tj (MAX)= 120°C, ambient temperature(MAX) : Ta=70°C
When VCC2 and Vc are connected :
Due to expression (a), for designs without cooling fins, duty=approx. 20% is required, as the
following calculation shows :
PD = (5Vx 8mA) + (30Vx 5mAx1ch x0.2)+(2.0Vx1.44A x1ch x0.2)
= 40mW + 30mW + 576mW
= 646mW
Tj (MAX)"--' (646mWx7irC/W) +70°C =approx. 115°C ......... OK
When an external resistor (REXT=0.90) is connected between VCC2 and VC :
Change the above condition :
VOH =2.0V -(0.90x1.44A)
PD when substituted in expression (a) :
PD = (5V x 8mA) + (30V x 5mA x1x 0.2) + (0.7V x1.44A x1x 0.2)
= 40mW + 30mW + 202mW
= 272mW
Tj (MAX) ; (272mW x 70°C /W) + 70°C = approx. 89°C
when Tj (MAX) = 120°C
- (calculation omitted)
Duty can be approx. 58%.
1998-05-15 6/8
TOSHIBA TD62708N
It Duty (when duty=20%)
Condition : pulse width =32ps (cycle =1280ps)
Duty = (32ps x 8ch) .= 1280ps = 20%
1280ps
ENABLE
INI TI
Pl2 IT
IN? IT
llN14 TI
IN5 Ti
IN8 TI
APPLICATION CIRCUIT
ENABLE
VC Resister Matrix
OUT1 r ,
‘OmNmU’thNfi
TD62708N
Vc (*1)
8ch Sink Driver
(TD62593AP)
L VCC2
(Note 1) TOSHIBA recommends external resistor REXT (approx. 0.90/2W) be connected
between VCC2 and VC.
PRECAUTIONS for USING
Utmost care is necessary in the design of the output line, VCC NCCI, VCC2, VC) and GND line
since IC may be destroyed due to short-circuit between outputs, air contamination fault, or fault
by improper grounding.
1998-05-15 7/8
TOSHIBA TD62708N
OUTLINE DRAWING
SDIP24-P-300-1.78 Unit : mm
24 13 E
(-1r-1C1l-1r-lr"-ll-ll-1r-1r'"'3rnr"-1 A
D) 35.
L..JL_JL.JL_JL.JL.JL_JL_JL_JL._JL.JL..J
" 22.5MAX _
22.0i0.2
[ qll mt
" 1 l " (iil $1
or) cu
L A CD
1.221 TYP 1.0i0.1 0.462t0.1
n /H, 7- n
Weight : 1.2g (Typ.)
1998-05-15 8/8
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