The ICL7667 is a dual monolithic high-speed driver designed
to convert TTL level signals into high current outputs at
voltages up to 15V. Its high speed and current output enable
it to drive large capacitive loads with high slew rates and low
propagation delays. With an output voltage swing only
millivolts less than the supply voltage and a maximum supply
voltage of 15V, the ICL7667 is well suited for driving power
MOSFETs in high frequency switched-mode power
converters. The ICL7667’s high current outputs minimize
power losses in the power MOSFETs by rapidly charging
and discharging the gate capacitance. The ICL7667’s inputs
are TTL compatible and can be directly driven by common
pulse-width modulation control ICs.
Ordering Information
PAR T
NUMBER
(Note)
ICL7667CBA*7667 CBA0
ICL7667CBAZA 7667 CBAZ0
ICL7667CPA*7667 CPA0
ICL7667CPAZ7667 CPAZ0
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination
finish, which is RoHS compliant and compatible with both SnPb and
Pb-free soldering operations). Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
PART
MARKING
TEMP.
RANGE
(°C)PACKAGE
to 70 8 Ld SOIC (N) M8.15
to 70 8 Ld SOIC (N)
(Pb-Free)
to 70 8 Ld PDIPE8.3
to 70 8 Ld PDIP*
(Pb-Free)
PKG.
DWG. #
M8.15
E8.3
FN2853.6
Features
• Fast Rise and Fall Times
- 30ns with 1000pF Load
• Wide 15V Supply Voltage Range
- V+ = +4.5V to +15V
- V- = -15V to Ground (0V)
• Low Power Consumption
- 4mW with Inputs Low
- 20mW with Inputs High
• TTL/CMOS Input Compatible Power Driver
OUT
= 7Ω Typ
-R
• Direct Interface with Common PWM Control ICs
• Pin Equivalent to DS0026/DS0056; TSC426
• Pb-Free Available (RoHS Compliant)
Applications
• Switching Power Supplies
• DC/DC Converters
• Motor Controllers
Pinout
ICL7667
(8 LD PDIP, SOIC)
TOP VIEW
N/C
IN A
V-
IN B
1
2
3
4
8
7
6
5
N/C
OUT A
V+
OUT B
Functional Diagram (Each Driver)
V+
≈2mA
OUT
IN
V-
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 1999, 2006, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Supply Voltages: V+ = +4.5V to +15V; V- = Ground to -15V
Logic Inputs: Logic Low = V- < Vin < 0.8V ; Logic High = 2.0V< Vin <
V+
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
is measured with the component mounted on an evaluation PC board in free air.
1. θ
JA
2. For θ
, the “case temp” location is the center of the exposed metal pad on the package underside.
JC
Electrical SpecificationsParameters with MIN and/or MAX limits are 100% tested at +25°C, V+ = 0V unless otherwise specified.
Temperature limits established by characterization and are not production tested.
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
ICL7667C, MICL7667M
T
= +25°C0°C ≤ TA ≤ +70°C
A
MINTYPMAXMINTYPMAX
UNITS
2
FN2853.6
April 29, 2010
Page 3
Test Circuits
ICL7667
V+ = 15V
INPUT
ICL7667
INPUT RISE AND
FALL TIMES ≤ 10ns
Typical Performance Curves
1µs
100
(ns)
f
AND t
r
t
10
1
V+ = 15V
t
RISE
t
FALL
10100100010k100k
C
(pF)
L
+
4.7µF
CL = 1000pF
µF
0.1
OUTPUT
INPUT
≈0.4V
OUTPUT
+5V
10%
T
D1
t
15V
0V
100
90
80
70
(ns)
60
D2
50
AND T
40
D1
T
30
20
10
90%
CL = 1nF
V+ = 15V
0
-5502570125
f
10%
TEMPERATURE (°C)
90%
T
D2
T
D2
t
r
10%
T
90%
D1
FIGURE 1. RISE AND FALL TIMES vs C
50
CL = 1nF
V+ = 15V
40
tr AND t
f
30
(ns)
f
AND t
20
r
t
10
0
-5502570125
TEMPERATURE (°C)
FIGURE 3. t
, tf vs TEMPERATUREFIGURE 4. IV+ vs C
r
L
(mA)
V+
I
FIGURE 2. TD1, TD2 vs TEMPERATURE
30
V+ = 15V
200kHz
10
3.0
1.0
101001k10k
C
(pF)
L
20kHz
100k
L
3
FN2853.6
April 29, 2010
Page 4
Typical Performance Curves (Continued)
ICL7667
100
10
(mA)
V+
I
1
100µA
10k100k1M10M
V+ = 15V
V+ = 5V
CL = 1nF
FREQUENCY (Hz)
FIGURE 5. IV+ vs FREQUENCYFIGURE 6. NO LOAD IV+ vs FREQUENCY
50
40
30
(ns)
f
20
AND t
D1
t
10
0
510 15
t
f
V+ (V)
t
D1
C
L
= 1nF
100
10
(mA)
V+
I
1
100mA
10k
50
40
30
(ns)
D2
20
AND t
r
t
10
0
51015
V+ = 15V
V+ = 5V
CL = 10pF
100k1M
FREQUENCY (Hz)
tr = T
CL = 10pF
V+ (V)
10M
D2
FIGURE 7. DELAY AND FALL TIMES vs V+FIGURE 8. RISE TIME vs V+
Detailed Description
The ICL7667 is a dual high-power CMOS inverter whose
inputs respond to TTL levels while the outputs can swing as
high as 15V. Its high output current enables it to rapidly
charge and discharge the gate capacitance of power
MOSFETs, minimizing the switching losses in switchmode
power supplies. Since the output stage is CMOS, the output
will swing to within millivolts of both V- and V+ without any
external parts or extra power supplies as required by the
DS0026/56 family. Although most specifications are at
V+ = 15V, the propagation delays and specifications are
almost independent of V+.
In addition to power MOS drivers, the ICL7667 is well suited
for other applications such as bus, control signal, and clock
drivers on large memory of microprocessor boards, where
the load capacitance is large and low propagation delays are
required. Other potential applications include peripheral
power drivers and charge-pump voltage inverters.
4
Input Stage
The input stage is a large N-Channel FET with a P-Channel
constant-current source. This circuit has a threshold of about
1.5V, relatively independent of the V+ voltage. This means
that the inputs will be directly compatible with TTL over the
entire 4.5V - 15V V+ range. Being CMOS, the inputs draw
less than 1µA of current over the entire input voltage range
of V- to V+. The quiescent current or no load supply current
of the ICL7667 is affected by the input voltage, going to
nearly zero when the inputs are at the 0 logic level and rising
to 7mA maximum when both inputs are at the 1 logic level. A
small amount of hysteresis, about 50mV to 100mV at the
input, is generated by positive feedback around the second
stage.
Output Stage
The ICL7667 output is a high-power CMOS inverter,
swinging between V- and V+. At V+ = 15V, the output
impedance of the inverter is typically 7Ω. The high peak
FN2853.6
April 29, 2010
Page 5
ICL7667
current capability of the ICL7667 enables it to drive a
1000pF load with a rise time of only 40ns. Because the
output stage impedance is very low, up to 300mA will flow
through the series N-Channel and P-Channel output devices
(from V+ to V-) during output transitions. This crossover current
is responsible for a significant portion of the internal power
dissipation of the ICL7667 at high frequencies. It can be
minimized by keeping the rise and fall times of the input to the
ICL7667 below 1µs.
Application Notes
Although the ICL7667 is simply a dual level-shifting inverter,
there are several areas to which careful attention must be
paid.
Grounding
Since the input and the high current output current paths
both include the V- pin, it is very important to minimize and
common impedance in the ground return. Since the ICL7667
is an inverter, any common impedance will generate
negative feedback, and will degrade the delay, rise and fall
times. Use a ground plane if possible, or use separate
ground returns for the input and output circuits. To minimize
any common inductance in the ground return, separate the
input and output circuit ground returns as close to the
ICL7667 as is possible.
Bypassing
The rapid charging and discharging of the load capacitance
requires very high current spikes from the power supplies. A
parallel combination of capacitors that has a low impedance
over a wide frequency range should be used. A 4.7µF
tantalum capacitor in parallel with a low inductance 0.1µF
capacitor is usually sufficient bypassing.
Output Damping
Ringing is a common problem in any circuit with very fast
rise or fall times. Such ringing will be aggravated by long
inductive lines with capacitive loads. Techniques to reduce
ringing include:
• Reduce inductance by making printed circuit board traces
as short as possible.
• Reduce inductance by using a ground plane or by closely
coupling the output lines to their return paths.
• Use a 10Ω to 30Ω resistor in series with the output of the
ICL7667. Although this reduces ringing, it will also slightly
increase the rise and fall times.
• Use good by-passing techniques to prevent supply
voltage ringing.
Power Dissipation
The power dissipation of the ICL7667 has three main
components:
1. Input inverter current loss
2. Output stage crossover current loss
3. Output stage I
2
R power loss
The sum of the above must stay within the specified limits for
reliable operation.
As noted above, the input inverter current is input voltage
dependent, with an I
of 0.1mA maximum with a logic 0
V+
input and 6mA maximum with a logic 1 input.
The output stage crowbar current is the current that flows
through the series N-Channel and P-Channel devices that
form the output. This current, about 300mA, occurs only
during output transitions. Caution: The inputs should never
be allowed to remain between V
and VIH since this could
IL
leave the output stage in a high current mode, rapidly
leading to destruction of the device. If only one of the drivers
is being used, be sure to tie the unused input to V- or
ground. NEVER leave an input floating. The average supply
current drawn by the output stage is frequency dependent,
as can be seen in Figure 5 (I
vs Frequency graph in the
V+
Typical Characteristics Graphs).
The output stage I
2
R power dissipation is nothing more than
the product of the output current times the voltage drop
across the output device. In addition to the current drawn by
any resistive load, there will be an output current due to the
charging and discharging of the load capacitance. In most
high frequency circuits the current used to charge and
discharge capacitance dominates, and the power dissipation
is approximately:
PACCVV2
=
f
(EQ. 1)
where C = Load Capacitance, f = Frequency
In cases where the load is a power MOSFET and the gate
drive requirement are described in terms of gate charge, the
ICL7667 power dissipation will be:
P
AC
where Q
QGV
f=
V
= Charge required to switch the gate, in
G
(EQ. 2)
Coulombs, f = Frequency.
Power MOS Driver Circuits
Power MOS Driver Requirements
Because it has a very high peak current output, the ICL7667
the at driving the gate of power MOS devices. The high
current output is important since it minimizes the time the
power MOS device is in the linear region. Figure 9 is a
typical curve of Charge vs Gate voltage for a power
MOSFET. The flat region is caused by the Miller
capacitance, where the drain-to-gate capacitance is
multiplied by the voltage gain of the FET. This increase in
capacitance occurs while the power MOSFET is in the linear
region and is dissipating significant amounts of power. The
very high current output of the ICL7667 is able to rapidly
5
FN2853.6
April 29, 2010
Page 6
ICL7667
overcome this high capacitance and quickly turns the
MOSFET fully on or off.
18
16
14
12
10
GATE TO SOURCE VOLTAGE
-2
FIGURE 9. MOSFET GATE DYNAMIC CHARACTERISTICS
ID = 1A
VDD = 50V
8
6
4
2
0
0246810 12 14 16 18 20
680pF
212pF
GATE CHARGE - Q
630pF
(NANO-COULOMBS)
G
VDD = 375V
VDD = 200V
Direct Drive of MOSFETs
Figure 11 shows interfaces between the ICL7667 and typical
switching regulator ICs. Note that unlike the DS0026, the
ICL7667 does not need a dropping resistor and speedup
capacitor between it and the regulator IC. The ICL7667, with
its high slew rate and high voltage drive can directly drive the
gate of the MOSFET. The SG1527 IC is the same as the
SG1525 IC, except that the outputs are inverted. This
inversion is needed since ICL7667 is an inverting buffer.
Transformer Coupled Drive of MOSFETs
Transformers are often used for isolation between the logic
and control section and the power section of a switching
regulator. The high output drive capability of the ICL7667
enables it to directly drive such transformers. Figure 11
shows a typical transformer coupled drive circuit. PWM ICs
with either active high or active low output can be used in
this circuit, since any inversion required can be obtained by
reversing the windings on the secondaries.
Buffered Drivers for Multiple MOSFETs
In very high power applications which use a group of
MOSFETs in parallel, the input capacitance may be very large
and it can be difficult to charge and discharge quickly.
Figure 13 shows a circuit which works very well with very
large capacitance loads. When the input of the driver is zero,
Q
is held in conduction by the lower half of the ICL7667 and
1
Q
is clamped off by Q1. When the input goes positive, Q1 is
2
turned off and a current pulse is applied to the gate of Q
the upper half of the ICL7667 through the transformer, T
After about 20ns, T
C
and the bootstrap circuit of C1, D1 and R1. This
GS
saturates and Q2 is held on by its own
1
bootstrap circuit may not be needed at frequencies greater
than 10kHz since the input capacitance of Q
discharges
2
slowly.
2
1
by
.
15V
+V
C
SG1527
GND
+165V
DC
V+
A
ICL7667
B
V-
FIGURE 10A.
IRF730
IRF730
6
FN2853.6
April 29, 2010
Page 7
15V
ICL7667
+165V
DC
18V
CAV
CB
CA1524
+V
TL494
GND
IN
EA
EB
C
C1
E1
C2
E2
+15V
1k
1k
V+
ICL7667
V-
IRF730
IRF730
V
OUT
FIGURE 10B.
FIGURE 10. DIRECT DRIVE OF MOSFET GATES
470
470
V+
ICL7667
V-
1µF
1µF
IRF730
IRF730
+165V
0V
-165V
V
OUT
0V - 5V
INPUT
FROM
PWM IC
FIGURE 11. TRANSFORMER COUPLED DRIVE CIRCUIT
0.1µF
IN914
FF10
D
1
R
10k
1
1/2
ICL7667
1/2
ICL7667
+
4.7μF
2200pF
FIGURE 12. VERY HIGH SPEED DRIVER
V+
4.7µF
Q
2
IRFF120
5FF10
IRFF120
Q
0.1µF
1000pF
C
1
Z
L
1
7
FN2853.6
April 29, 2010
Page 8
ICL7667
+15V
1kHz - 250kHz
SQUARE
WAVE
IN TTL
LEVELS
1/2
ICL7667
+
-
10
µF
IN4001
IN4001
+
-13.5V
47µF
FIGURE 13A.FIGURE 13B. OUTPUT CURRENT vs OUTPUT VOLTAGE
FIGURE 13. VOLTAGE INVERTER
Other Applications
Relay and Lamp Drivers
The ICL7667 is suitable for converting low power TTL or
CMOS signals into high current, high voltage outputs for
relays, lamps and other loads. Unlike many other level
translator/driver ICs, the ICL7667 will both source and sink
current. The continuous output current is limited to 200mA
2
by the I
Charge Pump or Voltage Inverters and Doublers
The low output impedance and wide V+ range of the
ICL7667 make it well suited for charge pump circuits. Figure
13A shows a typical charge pump voltage inverter circuit and
a typical performance curve. A common use of this circuit is
to provide a low current negative supply for analog circuitry
or RS232 drivers. With an input voltage of +15V, this circuit
will deliver 20mA at -12.6V. By increasing the size of the
capacitors, the current capability can be increased and the
voltage loss decreased. The practical range of the input
frequency is 500Hz to 250kHz. As the frequency goes up,
the charge pump capacitors can be made smaller, but the
internal losses in the ICL7667 will rise, reducing the circuit
efficiency.
R power dissipation in the output FETs.
-4
-6
-8
(V)
-10
OUT
V
-12
-14
520 40 60 80 100
SLOPE = 60Ω
I
OUT
f = 10kHz
(mA)
Clock Driver
Some microprocessors (such as the CDP68HC05 families)
use a clock signal to control the various LSI peripherals of
the family. The ICL7667s combination of low propagation
delay, high current drive capability and wide voltage swing
make it attractive for this application. Although the ICL7667
is primarily intended for driving power MOSFET gates at
15V, the ICL7667 also works well as a 5V high-speed buffer.
Unlike standard 4000 series CMOS, the ICL7667 uses short
channel length FETs and the ICL7667 is only slightly slower
at 5V than at 15V.
+15
IN4001
-
+
µF
10
IN4001
-
+
28.5V
47µF
1kHz - 250kHz
SQUARE
WAVE
IN TTL
LEVELS
+15V
1/2
ICL7667
FIGURE 14. VOLTAGE DOUBLER
Figure 14, a voltage doubler, is very similar in both circuitry
and performance. A potential use of Figure 13 would be to
supply the higher voltage needed for EEPROM or EPROM
programming.
8
FN2853.6
April 29, 2010
Page 9
Small Outline Plastic Packages (SOIC)
ICL7667
N
INDEX
AREA
123
-A-
E
-B-
SEATING PLANE
D
A
-C-
0.25(0.010)BMM
H
L
h x 45°
α
e
B
0.25(0.010)C AMBS
M
NOTES:
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of
Publication Number 95.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006
inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per
side.
5. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater
above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch).
10. Controlling dimension: MILLIMETER. Converted inch dimensions
are not necessarily exact.
A1
C
0.10(0.004)
M8.15 (JEDEC MS-012-AA ISSUE C)
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
INCHESMILLIMETERS
SYMBOL
A0.05320.06881.351.75-
A10.00400.00980.100.25-
B0.0130.0200.330.519
C0.00750.00980.190.25-
D0.18900.19684.805.003
E0.14970.15743.804.004
e0.050 BSC1.27 BSC-
H0.22840.24405.806.20-
h0.00990.01960.250.505
L0.0160.0500.401.276
N887
α
0°8°0°8°-
NOTESMINMAXMINMAX
Rev. 1 6/05
9
FN2853.6
April 29, 2010
Page 10
Dual-In-Line Plastic Packages (PDIP)
ICL7667
N
D1
-C-
E1
-B-
A2
A
L
A
1
e
C
e
e
INDEX
AREA
BASE
PLANE
SEATING
PLANE
D1
B1
12 3N/2
-AD
e
B
0.010 (0.25)C AMBS
NOTES:
1. Controlling Dimensions: INCH. In case of conflict between
English and Metric dimensions, the inch dimensions control.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Symbols are defined in the “MO Series Symbol List” in Section
2.2 of Publication No. 95.
4. Dimensions A, A1 and L are measured with the package seated
in JEDEC seating plane gauge GS-3.
5. D, D1, and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch
(0.25mm).
6. E andare measured with the leads constrained to be per-
7. e
e
pendicular to datum .
A
and eC are measured at the lead tips with the leads uncon-
B
strained. e
must be zero or greater.
C
-C-
8. B1 maximum dimensions do not include dambar protrusions.
Dambar protrusions shall not exceed 0.010 inch (0.25mm).
9. N is the maximum number of terminal positions.
10. Corner leads (1, N, N/2 and N/2 + 1) for E8.3, E16.3, E18.3,
E28.3, E42.6 will have a B1 dimension of 0.030 - 0.045 inch
(0.76 - 1.14mm).
E8.3 (JEDEC MS-001-BA ISSUE D)
8 LEAD DUAL-IN-LINE PLASTIC PACKAGE
INCHESMILLIMETERS
SYMBOL
A-0.210-5.334
E
A10.015-0.39-4
A20.1150.1952.934.95-
B0.0140.0220.3560.558-
C
L
A
C
B
B10.0450.0701.151.778, 10
C0.0080.0140.2040.355-
D0.3550.4009.0110.165
D10.005-0.13-5
E0.3000.3257.628.256
E10.2400.2806.107.115
e0.100 BSC2.54 BSC-
e
A
e
B
0.300 BSC7.62 BSC6
-0.430-10.927
L0.1150.1502.933.814
N889
NOTESMINMAXMINMAX
Rev. 0 12/93
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
10
FN2853.6
April 29, 2010
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