GL494 Hynix Semiconductor, GL494 Datasheet
GL494
Manufacturer Part Number
GL494
Description
Manufacturer
Hynix Semiconductor
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
GL494 DIP16
Manufacturer:
HYNIX
Quantity:
137
Description
The GL494 incorporates on a single monolithic chip all the
functions required in the construction of a pulse-width-
modulation control circuit. Designed primarily for power
supply control, the GL494 contains an on-chip 5-volt
regulator, two error amplifiers, adjustable oscillator, dead-
time control comparator, pulse-steering flip-flop, and
output-control
transistors pro-vide either common-emitter or emitter-
follower output capability. Push-pull or single-ended
output operation may be selected through the output-
control function. The ar-chitecture of the GL494 prohibits
the possibility of either output being pulsed twice during
push-pull operation.
Features
— Complete PWM Power Control Circuitry
— Uncommitted Outputs for 200mA Sink or Source
— Output Control Selects Single-Ended or Push-Pull
— Internal Circuitry Prohibits Double Pulse at Either
— Internal Regulator Provides a Stable 5V Reference
— Variable Dead-Time Provides Control Over Total
Block Diagram
Operation
Output
Supply
Range
NONINVERTING(16)
NONINVERTING(1)
INVERTING
INVERTING
FEEDBACK
CONTROL
circuitry.
DEAD
INPUT
INPUT
TIME
INPUT
INPUT
0.1V
(15)
(2)
ERROR AMPLIFIERS
(3)
(4)
The
R
C
T
T
ERROR AMP1
ERROR AMP2
uncommitted
OSCILLATOR
COMPARATOR
output
PWM
REFERENCE
REGULATOR
1
PULSE STEERING
Pin Configuration
Function Table
Output Control
Grounded
At
FLIP FLOP
DEAD TIME CONTROL
V
ref
PWM CONTROL CIRCUIT
T
NONINV INPUT
(See Function Table)
CONTROL
FEEDBACK
Q
V
(12)
Q
OUTPUT
REF OUT
(14)
GND
INV. INPUT
CC
(7)
GND
(13)
Cr
C1
Rr
Output Function
Single-ended or Parallel Output
Normal Push-Pull Operation
1
2
3
4
5
6
7
8
E1(10) C2(11)
E1(9) C1(8)
16
15
14
13
12
11
10
9
GL494
NON INV INPUT
INV. INPUT
REF. OUT
OUTPUT CONTROL
Vcc
C2
E2
E1
GL494
Related parts for GL494
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
GL6965Telephone Speech Network with Dialer Interface
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
GL6962Low Voltage Universal Speech Network
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
ROM/RAM size: 2 K/128 bytes, 2-5.5 V , 4-8 MHz,8-bit single-chip microcontroller
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
GL6551COMPANDER
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
ROM/RAM size:2 Kb/128 bytes,4.25-5.5 V, 12 MHz, 8-bit microcontroller
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
Asynchronous communication element with FIFO
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
256K x 1-Bit CMOS DRAM
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
128M(4Mx32) GDDR SDRAM
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
Manufacturer:
Hynix Semiconductor
Datasheet:
Part Number:
Description:
Manufacturer:
Hynix Semiconductor
Datasheet: