Motore di ricerca datesheet componenti elettronici |
|
TEA1713T Scheda tecnica(PDF) 10 Page - NXP Semiconductors |
|
TEA1713T Scheda tecnica(HTML) 10 Page - NXP Semiconductors |
10 / 45 page TEA1713T_1 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 01 — 22 December 2009 10 of 45 NXP Semiconductors TEA1713T Resonant power supply control IC with PFC 7.4 Enable input (pin SSHBC/EN) The power supply application can be completely disabled by pulling pin SSHBC/EN LOW. Figure 4 illustrates the internal functionality. When a voltage is present on pin SUPHV or on pin SUPIC, a current Ipu(EN) (typ. 42 μA) flows out of SSHBC/EN. If the pin is not pulled-down, this current will lift the voltage up to Vpu(EN) (typ. 3 V). Since this voltage is above both Ven(PFC)(EN) (typ. 1.2 V) and Ven(IC)(EN) (typ. 2.2 V), the IC will be completely enabled. The IC can be completely disabled by pulling the voltage on SSHBC/EN down below both Ven(PFC)(EN) and Ven(IC)(EN) via an opto-coupler driven from the secondary side of the HBC transformer (see Figure 4). The PFC controller will stop switching immediately, but the HBC controller will continue switching until the low-side stroke is active. It is also possible to control the voltage on SSHBC/EN from another circuit on the secondary side via a diode. The external pull-down current must be larger than the internal soft start charge current Iss(hf)(SSHBC). If the voltage on SSHBC/EN is pulled down below Ven(IC)(EN), but not below Ven(PFC)(EN), only the HBC will be disabled. This feature can be useful when another power converter is connected to the boost voltage of the PFC. The low-side power switch of the HBC will be on when the HBC is disabled via the SSHBC/EN pin. Boost charge Boost voltage is built up by operational PFC. Operational supply Output voltage is generated. Both PFC and HBC controllers are fully operational. Restart Activated when a protection function is triggered. Restart timer is activated. During this time, PFC and HBC controllers are disabled and CSUPREG is not charged. CSUPIC is charged. Protection shut-down Activated when a protection function is triggered. IC is not operational. PFC and HBC controllers are disabled and CSUPIC and CSUPREG are not charged. Table 3. Operating states …continued State Description |
Codice articolo simile - TEA1713T |
|
Descrizione simile - TEA1713T |
|
|
Link URL |
Privacy Policy |
ALLDATASHEETIT.COM |
Lei ha avuto il aiuto da alldatasheet? [ DONATE ] |
Di alldatasheet | Richest di pubblicita | contatti | Privacy Policy | scambio Link | Ricerca produttore 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 |