|
|
PDF HY3845 Data sheet ( Hoja de datos )
| Número de pieza | HY3845 | |
| Descripción | (HY3842 / HY3845) PWM controller | |
| Fabricantes | Hooyi | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HY3845 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
|
No Preview Available !
HY3842/43/44/45
DESCRIPTION
The HY3842D-N/3843D-N/3844D-N/3845D-N, are fixed frequency
current mode PWM controller. They are specially designed for OFF−Line and DC to DC
converter applications with a minimal external components. Internally implemented circuits
include a trimmed oscillator for precise duty cycle control, a temperature compensated
reference, high gain error amplifier, current sensing comparator, and a high current totem pole
output ideally suited for driving a power MOSFET. Protection circuitry
includes built under voltage lockout and current limiting.
The HY3842D-N, HY3844D-N, have UVLO thresholds of 16 V (on) and 10 V (off).
The corresponding thresholds for the HY3843D-N/3845D- N are 8.4V (on) and 7.6V (off).
The HY3842D-N, HY3843D-N, can operate within 100% duty cycle. The HY3844D-N,
HY3845D-N, can operate within 50% duty cycle.
The HY384XD-N have Start-Up Current 0.17mA (typ).
PIN CONNECTION
(TOP VIEW)
FEATURES
• Low Start-Up and Operating Current
• High Current Totem Pole Output
• Under voltage Lockout With Hysteresis
• Operating Frequency Up To 500KHz
BLOCK DIAGRAM
(toggle flip flop used only in HY3844, HY3845)
Absolute Maximum Ratings
Characteristic
Supply Voltage (low impedance source)
Output Current
Input Voltage (Analog Inputs pins 2,3)
Error Amp Output Sink Current
Power Dissipation (TA=250C)
Storage Temperature Range
Lead Temperature (soldering 5 sec.)
Symbol
VCC
IO
VI
ISINK (E.A)
PO
Tstg
TL
Value
30
±1
−0.3 to 5.5
10
1
-65 to150
260
1
Unit
V
A
V
mA
W
oC
oC
www.hooyi-semi.com
Free Datasheet http://www.nDatasheet.com
1 page  
HY3842/43/44/45
SCR must be selected for a holding current of less than 0.5mA.
The simple two transistor circuit can be used in place of the SCR as shown.
Figure 5. Latched Shutdown
Figure 6. Error Amplifier Compensation
5
www.hooyi-semi.com
Free Datasheet http://www.nDatasheet.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HY3845.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HY3842 | (HY3842 / HY3845) PWM controller | Hooyi |
| HY3843 | (HY3842 / HY3845) PWM controller | Hooyi |
| HY3844 | (HY3842 / HY3845) PWM controller | Hooyi |
| HY3845 | (HY3842 / HY3845) PWM controller | Hooyi |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |