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Teilenummer | TC4627 |
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Beschreibung | (TC4626 / TC4627) Power CMOS Drivers | |
Hersteller | Microchip | |
Logo | ||
Gesamt 18 Seiten TC4626/TC4627
Power CMOS Drivers With Voltage Tripler
Features
• Power Driver With On Board Voltage Booster
• Low IDD – <4mA
• Small Package – 8-Pin PDIP
• Under-Voltage Circuitry
• Fast Rise-Fall Time – <40nsec @1000pF
• Below-Rail Input Protection
Applications
• Raises 5V to drive higher – Vgs (ON) MOSFETs
• Eliminates one system power supply
Device Selection Table
Part
Number
Package
Temp. Range
TC4626COE
TC4626CPA
TC4626EOE
TC4626EPA
16-Pin SOIC (Wide)
8-Pin PDIP
16-Pin SOIC (Wide)
8-Pin PDIP
-55°C to +125°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
TC4626MJA
TC4627COE
TC4627CPA
TC4627EOE
TC4627EPA
TC4627MJA
8-Pin CERDIP
16-Pin SOIC (Wide)
8-Pin PDIP
16-Pin SOIC (Wide)
8-Pin PDIP
8-Pin CERDIP
0°C to +70°C
-55°C to +125°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
Functional Block Diagram
EXT +
C1
EXT +
C2
2
C1+
C1- 1
3
C2
V = 2 x VDD
Voltage
Booster
VDD
8
7
In
GND 4
Clock
Package Type
8-Pin PDIP/CERDIP
C1– 1
C1+ 2
C2 3
GND 4
TC4626
TC4627
8 VDD
7 IN
6 VBOOST
5 OUT
16-Pin SOIC (Wide)
C1– 1
NC 2
C1+ 3
NC 4
C2 5
NC 6
NC 7
GND 8
16 VDD
15 NC
14 NC
TC4626 13 IN
TC4627 12 NC
11 VBOOST
10 NC
9 OUT
General Description
The TC4626/TC4627 are single CMOS high speed
drivers with an on-board voltage boost circuit. These
parts work with an input supply voltage from 4 to 6 volts.
The internal voltage booster will produce a VBOOST
potential up to 12 volts above VIN. This VBOOST is not
regulated, so its voltage is dependent on the input VDD
voltage and output drive loading requirements. An
internal undervoltage lockout circuit keeps the output in
a low state when VBOOST drops below 7.8 volts. Output
is enabled when VBOOST is above 11.3 volts.
VBOOST
Noninverting
TC4627
(Unregulated 3 x VDD)
UV LOCK
6
EXT +
C3
5 Output
Inverting
TC4626
NOTE: Pin numbers correspond to 8-pin package.
2001-2012 Microchip Technology Inc.
DS21426C-page 1
Free Datasheet http://www.Datasheet4U.com
TC4626/TC4627
3.1 BOOSTER FUNCTION
The voltage booster is an unregulated voltage tripler
circuit. The tripler consists of three sets of internal
switches and three external capacitors. S1a and S1b
charge capacitor C1 to VDD potential. S2a and S2b add
FIGURE 3-3:
VOLTAGE BOOSTER
+
C3
6 3 x VDD, VBOOST
+
C2
3
2 x VDD
C1 potential to VDD input to charge C2 to 2 x VDD. S3a
and S3b add C1 potential to C2 to charge C3 to 3 x
VDD. The position of the switches is controlled by the
internal 4 phase clock.
6
S3a
S2a S3b
(4 to 6V)
VDD
8
+
C1
2
1
GND
4
S1a
S1b
S2b
FIGURE 3-4:
POSITION OF SWITCHES
3 x VDD
Pin 1 & 2 Waveforms
Pin 2
Voltage
2 x VDD
VDD
Pin 1
Voltage
2 x VDD
VDD
0
DS21426C-page 6
On
S1
Off
On
S2
Off
On
S3
Off
2001-2012 Microchip Technology Inc.
Free Datasheet http://www.Datasheet4U.com
6 Page TC4626/TC4627
Package Dimensions (Continued)
Note: For the most current package drawings, please see the Microchip Packaging Specification located
at http://www.microchip.com/packaging
16-Pin SOIC (Wide)
PIN 1
.299 (7.59) .419 (10.65)
.291 (7.40) .398 (10.10)
.413 (10.49)
.398 (10.10)
.050 (1.27) TYP. .019 (0.48)
.014 (0.36)
.104 (2.64)
.097 (2.46)
.012 (0.30)
.004 (0.10)
8°
MAX.
.013 (0.33)
.009 (0.23)
.050 (1.27)
.016 (0.40)
Dimensions: inches (mm)
DS21426C-page 12
2001-2012 Microchip Technology Inc.
Free Datasheet http://www.Datasheet4U.com
12 Page | ||
Seiten | Gesamt 18 Seiten | |
PDF Download | [ TC4627 Schematic.PDF ] |
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