 |
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
|
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
S-8338AAFA-P8T1G Datasheet(PDF) 13 Page - Seiko Instruments Inc |
|
||||||||||||||||||||||||||||||
S-8338AAFA-P8T1G Datasheet(HTML) 13 Page - Seiko Instruments Inc |
|
|
13 / 51 page  STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.4.0_01 S-8337/8338 Series 13 3. Shutdown pin (S-8338 Series only) This pin stops or starts step-up operations. Switching the shutdown pin to the “L” level stops operation of all the internal circuits and reduces the current consumption significantly. DO NOT use the shutdown pin in a floating state because it is not pulled up or pulled down internally. DO NOT apply voltage of between 0.3 V and 1.8 V to the shutdown pin because applying such a voltage increases the current consumption. If the shutdown pin is not used, connect it to the VIN pin. Table 7 Shutdown Pin CR Oscillator Output Voltage “H” Operates Fixed “L” Stopped ≅ VIN*1 *1. Voltage of VIN from which the voltage drop from the DC resistance of the inductor and the forward voltage of the diode are subtracted ON/OFF VIN VSS Figure 9 4. Timer latch short-circuit protection function This IC has a timer latch short-circuit protection circuit that stops the switching operation when the output voltage drops for a specific time due to output short-circuiting. A capacitor (CSP) that is used to set the delay time of this short-circuit protection circuit is connected to the CSP pin. This IC operates at the maximum duty ratio if the output voltage drops due to output short-circuiting. At the maximum duty ratio, constant-current charging of CSP starts. If this status lasts for a specific time and the CSP pin voltage rises above the reference voltage (1 V), the latch mode is set. Note that the latch mode is different from the shutdown status in that the switching operation is stopped but the internal circuitry operates normally. To reset the latch operation to protect the IC from short-circuiting, either lower VIN to the timer latch reset voltage or lower or lower the level of the shutdown pin to “L”. Note that the latch operation is not reset even if VIN falls below the UVLO voltage. 5. UVLO function This IC includes a UVLO (under-voltage lockout) circuit to prevent the IC from malfunctioning due to a transient status when power is applied or a momentary drop of the supply voltage. When UVLO is in the detection state, switching is stopped and the external FET is held in the off status. Once UVLO enters the detection state, the soft-start function is reset. Note that the other internal circuits operate normally and that the status is different from the power-off status. |
Número de pieza similar - S-8338AAFA-P8T1G |
|
Descripción similar - S-8338AAFA-P8T1G |
|
|
Enlace URL |
| Política de Privacidad |
| ALLDATASHEET.ES |
| ¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Spanish ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
