5044d5670fcc90eecf6e GE 8521-TC-SA
50d8cd05da225d3323dc GE 8521-TC-SA
cfe6b0f72e62defdd3b6 GE 8521-TC-SA
f6e77d5bf5046d299308 GE 8521-TC-SA

GE 8521-TC-SA

The S-8520 Series is a DC-DC converter using a pulse width modulation method (PWM) and features a low
current consumption.
In conventional PFM DC-DC converters, pulses are skipped when the output load current is low, causing a
fluctuation in the ripple frequency of the output voltage, resulting in an increase in the ripple voltage.
The switching frequency does not change, although the pulse width changes from 0 to 100% corresponding to
each load current. The ripple voltage generated from switching can thus be removed easily through a filter
because the switching frequency is constant. And the ripple voltage will be skipped to be low current
consumption when the pulse width is 0% or it is no load, input current voltage is high.
PWM / PFM switching control (S-8521 Series)
S-8521 Series is a DC-DC converter that automatically switches between a pulse width modulation method
(PWM) and a pulse frequency modulation method (PFM), depending on the load current, and features low
current consumption.
The S-8521 Series operates under PWM control with the pulse width duty changing from 25 to 100% in a high
output load current area.
The S-8521 Series operates under PFM control with the pulse width duty fixed at 25%, and pulses are skipped
according to the load current. The oscillation circuit thus oscillates intermittently so that the resultant lower self
current consumption prevents a reduction in the efficiency at a low load current. The switching point from PWM
control to PFM control depends on the external devices (coil, diode, etc.), input voltage and output voltage.
The S-8521 Series is an especially highly efficient DC-DC converter at an output current around 100 A.

Add to Quote
Category:
Email: Jiedong@sxrszdh.com
Phone: +86 15340683922
Sales:Wu Jiedong
All prices listed on the official website are subject to confirmation by contact: Wu Jiedong (manager).
Our product: brand new original packaging
Our payment: 100% telegraphic transfer of inventory items before shipment, conditions can be proposed!
If you have any downtime spare parts that you cannot find, please feel free to call or use email to contact me. If there are issues that the product cannot solve, please contact me. Product prices can be negotiated. Please do not consider contacting me!

Description

The S-8520/8521 Series is a CMOS step-down switching regulator-controller with PWM control (S-8520 Series) and PWM
/ PFM switching control (S-8521 Series). The S-8520/8521 Series has a reference voltage source, an oscillation circuit, an
error amplifier, and other components.
The S-8520 Series provides low-ripple power, high efficiency, and excellent transient characteristics due to a PWM control
circuit capable of varying the duty ratio linearly from 0% up to 100%. The S-8520/8521 Series also has a soft-start circuit
that prevents overshoot at startup.
The S-8521 Series works with either PWM control or PFM control. It normally operates using PWM control with a duty ratio
of 25% to 100%, but under a light load, it automatically switches to PFM control with a duty ratio of 25%. The S-8520/8521
Series ensures high efficiency over a wide range of conditions for devices, from the standby mode to the operation.
By adding external Pch power MOS FET or PNP transistor, coil, capacitor, and externally connected diode, the
S-8520/8521 Series can function as a step-down switching regulator, and is ideal for power supply units of portable
devices due to small SOT-23-5 and the feature of low current consumption. It is also ideal for AC adapters due to the input
voltage up to 16 V.
 Features
 Low current consumption During operation: 60 A max. (A, B types)
21 A max. (C, D types)
100 A max. (E, F types)
During shutdown: 0.5 A max.
 Input voltage: 2.5 V to 16 V (B, D, F types)
2.5 V to 10 V (A, C, E types)
 Output voltage: Selectable between 1.5 V and 6.0 V in 0.1 V step
 Duty ratio: 0% to 100% PWM control (S-8520 Series)
25% to100% PWM / PFM switching control (S-8521 Series)
 External parts are Pch power MOS FET or PNP transistor, coil, diode, and capacitor only
(When using PNP transistor, add base resistor and capacitor).
 Oscillation frequency: 180 kHz typ. (A, B types)
60 kHz typ. (C, D types)
300 kHz typ. (E, F types)
 Soft-start function: 8 ms. typ. (A, B types)
12 ms. typ. (C, D types)
4.5 ms. typ. (E, F types)
 With a shutdown function
 With a built-in overload protection circuit Overload detection time: 4 ms. typ. (A type)
14 ms. typ. (C type)
2.6 ms. typ. (E type)
f6e77d5bf5046d299308 GE 8521-TC-SA

cfe6b0f72e62defdd3b6 GE 8521-TC-SA

50d8cd05da225d3323dc GE 8521-TC-SA

5044d5670fcc90eecf6e GE 8521-TC-SA
DS215SLCCG4AZZ01A
DS215TCCBG3BZZ01B
DS215TCCBG8BZZ01A
DS215TCQAP1BZZ01A
DS215TMCBP3AZZ03A
DS215TMIBP1AZZ01A
DS215UCIAG1AZZ05A
DS215UCVAG3AD
DS215UDSAG1AZZ01A
DS215UPLAG1BZZ01A
IC3600SOTH1
IC3600SSLB1
IC3600STDC1

Email: Jiedong@sxrszdh.com
Phone: +86 15340683922
Sales:Wu Jiedong
Our products are guaranteed for 1 year, with new and original production stopped and imported spare parts.
All prices listed on the official website are subject to confirmation by contact: Wu Jiedong (manager).
Our product: brand new original packaging
Our warranty: All new or repaired parts have a 12 month warranty period beginning
Our payment: 100% telegraphic transfer of inventory items before shipment, conditions can be proposed!
If you have any downtime spare parts that you cannot find, please feel free to call or use email to contact me. If there are issues that the product cannot solve, please contact me. Product prices can be negotiated. Please do not consider contacting me!

Related products