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PDF SSL4120 Data sheet ( Hoja de datos )
| Número de pieza | SSL4120 | |
| Descripción | Resonant power supply controller IC | |
| Fabricantes | NXP Semiconductors | |
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SSL4120
Resonant power supply controller IC with PFC for LED
lighting
Rev. 2.1 — 18 February 2014
Product data sheet
1. General description
The SSL4120 integrates a Power Factor Corrector (PFC) controller and a controller for a
Half-Bridge resonant Converter (HBC) in a multi-chip IC. It provides the drive function for
the discrete MOSFET in an up-converter and for the two discrete power MOSFETs in a
resonant half-bridge configuration.
Efficient PFC operation is achieved by implementing functions for Quasi-Resonant (QR)
operation at high-power levels and QR with valley skipping at lower power levels.
OverCurrent Protection (OCP), OverVoltage Protection (OVP) and demagnetization
sensing ensure safe operation under all conditions
The HBC module is a high-voltage controller for a zero-voltage switching LLC resonant
converter. It contains a high-voltage level shift circuit and several protection circuits
including OCP, open-loop protection, capacitive mode protection and a general purpose
latched protection input.
The high-voltage chip is fabricated using a proprietary high-voltage Bipolar-CMOS-DMOS
power logic process enabling efficient direct start-up from the rectified universal mains
voltage. The low-voltage Silicon-On-Insulator (SOI) chip is used for accurate, high-speed
protection functions and control.
The SSL4120 controlled PFC circuit and resonant converter topology is very flexible. It
can be used for a broad range of applications over a wide mains voltage range.
Combining PFC and HBC controllers in a single IC makes the SSL4120 ideal for
controlling compact power supplies in lighting applications, such as LED drivers.
Using the SSL4120, highly efficient and reliable power supplies providing over 100 W can
be designed easily which use the minimum of external components.
Remark: Unless otherwise stated, all values are typical.
1 page  
NXP Semiconductors
SSL4120
Resonant power supply controller IC with PFC for LED lighting
Table 2. Pin description …continued
Symbol
Pin Description
SUPHV
12 internal HV start-up source high-voltage supply input.
Externally connected to the boost voltage
GATEHS
13 HBC high-side MOSFET gate driver output
SUPHS
14 high-side driver supply input.
Externally connected to the bootstrap capacitor
HB 15 reference for high-side driver and input for half-bridge slope detection.
Externally connected to half-bridge node HB between HBC MOSFETs (see
Figure 19)
n.c. 16 not connected; high-voltage spacer
SNSCURHBC 17 momentary HBC current sense input.
Externally connected to the resonant current sense resistor
SGND
18 signal ground and IC reference (ground).
CFMIN
19 HBC minimum frequency setting.
Externally connected to the capacitor
RFMAX
20 HBC maximum frequency setting.
Externally connected to the resistor
SNSFB
21 output voltage regulation feedback sense input.
Externally connected to opto-coupler
SSHBC/EN 22
• HBC soft-start timing input
• IC enable input. Enables PFC only or both PFC and HBC controllers.
Externally connected to soft-start capacitor and enable pull-down signal
RCPROT
23 protection timer setting for time-out and restart.
Externally connected to resistor and capacitor
SNSBOOST 24 sense input for boost voltage regulation.
Externally connected to resistive divided Vboost
SSL4120
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2.1 — 18 February 2014
© NXP B.V. 2014. All rights reserved.
5 of 48
5 Page 
NXP Semiconductors
SSL4120
Resonant power supply controller IC with PFC for LED lighting
Table 3. Operating states
State
Description
No supply
Disabled IC
Supply voltages on the SUPIC and SUPHV pins are too low to provide
any functionality. Undervoltage protection (UVP supplies; see
Section 7.9) is active when VSUPHV < Vrst(SUPHV) and
VSUPIC < Vrst(SUPIC). The IC is reset.
The IC is disabled because the SSHBC/EN pin is LOW.
Thermal hold
Activated when OTP is active. The IC is not operating. The PFC and
HBC controllers are disabled and CSUPIC and CSUPREG are not
charged.
SUPIC charge
SUPREG charge
Boost charge
Operational supply
The HV start-up source charges the IC supply capacitor (CSUPIC).
CSUPREG is not charged.
The series regulator charges the stabilized supply capacitor
(CSUPREG).
The operational PFC builds up Vboost.
The output voltage is generated. Both the PFC and HBC controllers
are fully operational.
Restart
Protection shut-down
Activated when a protection function is triggered. The restart timer is
activated. During this time, both the PFC/HBC controllers are disabled
and CSUPREG is not charged. CSUPIC is charged.
Activated when a protection function is triggered. The IC is not
operational. The PFC and HBC controllers are disabled and
CSUPIC/CSUPREG are not charged.
7.4 Enable input (SSHBC/EN pin)
The power supply application is disabled by pulling the SSHBC/EN pin LOW.
Figure 4 shows the internal functionality. When a voltage is present on the SUPHV pin or
on the SUPIC pin, a current Ipu(EN) = 42 A flows from the SSHBC/EN pin. If the pin is not
pulled down, the current increases the voltage up to Vpu(EN) = 3 V. Since the voltage is
above both Ven(PFC)(EN) = 1.2 V and Ven(IC)(EN) = 2.2 V, the IC is enabled.
The IC is disabled when the SSHBC/EN pin voltage is pulled down under Ven(PFC)(EN) and
Ven(IC)(EN) via an optocoupler driven from the HBC transformer secondary side (see
Figure 4). The PFC controller stops switching immediately but the HBC controller
continues switching until the low-side stroke is active. It is also possible to control the
voltage on the SSHBC/EN pin 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 under Ven(IC)(EN), but not under Ven(PFC)(EN), only the
HBC is disabled. This feature is useful when another power converter is connected to the
PFC Vboost.
The low-side power switch of the HBC is on when the HBC is disabled using the
SSHBC/EN pin.
SSL4120
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2.1 — 18 February 2014
© NXP B.V. 2014. All rights reserved.
11 of 48
11 Page | ||
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| PDF Descargar | [ Datasheet SSL4120.PDF ] | |
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