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Description
High-voltage resonant controller
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Features
● Interface with PFC controller
● Latched disable input
● Burst-mode operation at light load
● Input for power-ON/OFF sequencing or brownout protection
● Non-linear soft-start for monotonic output voltage rise
L6599D High voltage resonant controller Description
The L6599D is high voltage resonant controller. It is used to set the operating frequency of the resonant converter by using the external capacitor. They are used mostly in oscillators and PFC Controllers. They came in DIP and SO-16 Packages. It contains flip flops, logic gates, transistors, BJT, MOSFET, phototransistor, optocoupler, operational amplifiers and comparators along with RC network.
Pin configuration and their features
S No | Pin | Description |
1 | Css | It is dedicated to soft start. It is normally connected to external capacitor and Rfmin with resistor. It sets time frequency constant and maximum oscillating frequency using RC network. |
2 | Delay | It is dedicated to delay shutdown in case of over current. The delay is set by RC network. |
3 | Cf | It is dedicated to timing capacitor which is connected directly to ground and it is charged and discharged by Rfmin pin. |
4 | Rfmin | It is used as oscillator frequency setting at minimum level. It provides a reference voltage of 2V. |
5 | Stby | It is used as operation threshold for burst hold. It sense voltage for feedback control and goes to idle state if it is lower than reference voltage. |
6 | Isen | It is used for input for sensing current. It sense average current. |
7 | Line | It is used as line sensing input. It is used for performing AC or DC brownout protection |
8 | Dis | It is latched pin for shutting down the IC. The pin is connected with the comparator that when it exceeds designated voltage (1.85 Volts) the IC gets shutdown. |
9 | PFC_Stop | It is used as ON/OFF control of PFC Controller. |
10 | Gnd | It is used as ground. |
11 | Lvg | It is lower side voltage gate for driving lower part half bridge’s MOSFET. |
12 | Vcc | It is used as the supply voltage. |
13 | N.C. | It is not connected pin. It is used for isolating high voltage with the IC pin. |
14 | Out | Output Pin. It is used as floating ground |
15 | Hvg | It is high side voltage gate for driving upper part half bridge’s MOSFET. |
16 | Vboot | It is used as supply voltage for bootstrap capacitor |
L6599D Specifications and Features
● They have variable frequency control
● They work with 50% duty cycle
● They have operating frequency up to 500 kHz
L6599D Working Principle
Applications of L6599D
L6599D is normally used in LCD and switch mode power supply. Among them there are some prominent applications.
1. Oscillators
They are used as oscillators and they are controlled by RC network in which Cf charges (located at pin 3) and discharges by the current that is coming through the node of Rfmin connected with Rfmin resistor and phototransistor at pin 4.
2. Soft Start For Resonant Converters
It is used as soft start for resonant converters. Soft start is basically achieved by shifting the operational frequency from the high level till control loop takes place. RC network is used for this purpose and resonant freqekuncy resistor is placed in parallel with resistor for soft start (Rss) to determine the frequency initially. The Csks Capacitor (Capacitor soft start) is charged. When it is 2V which is equivalent to 2V reference voltage then the current goes to 0 in Rss as it then behaves like a short circuit. It takes around 5 time constraints then for output voltage to reach the regulated value of the circuit until the control loop takes place.
Preview of the first 3 pages of the data sheet
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10000 buyer reviews from United States
Anthony Hill
Length of registration:7 years
The L6599D integrated circuit is an excellent choice for a variety of applications. It is a highly reliable and efficient device that offers excellent performance. It is also very easy to use and has a wide range of features that make it suitable for a variety of applications. The device is also very cost effective, making it an ideal choice for any project. Overall, the L6599D integrated circuit
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03/17/2023
carol
Length of registration:9 years
The quality of L6599D is very good, the price is affordable, our customers are very satisfied, it completely exceeds expectations, the delivery is very fast, and the packaging is very careful and tight.
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09/07/2022
Juan Manuel Miranda
Length of registration:5 years
originales
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11/19/2019
Sandra del Pilar Villavicencio Morejon
Length of registration:9 years
Very satisfied with
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10/20/2019
Rafael Alejandro Gutierrez Hernandez
Length of registration:7 years
Todo Ok. Gracias
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01/19/2017
Renato Bragion
Length of registration:2 years
Muito Bom! Recomendo!
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04/02/2021
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L6599D
L6599D has several brands around the world that may have alternate names for L6599D due to regional differences or acquisition. L6599D may also be known as the following names:
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