IQ24500HZX10 Datasheet, PDF (10/12 Pages) SynQor Worldwide Headquarters – Half-brick DC-DC Converter

Technical Specification
Input: 18-36 V
Output: 50 V
Current: 10 A (500 W)
Package: Half-brick
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC-DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input System
Instability” is available on the SynQor website which provides
an understanding of why this instability arises, and shows the
preferred solution for correcting it.
Application Circuits: Figure C below provides a typical circuit
diagram which details the input filtering and voltage trimming.
Input Filtering and External Input Capacitance: Figure D
below shows the internal input filter components. This filter dra-
matically reduces input terminal ripple current, which otherwise
could exceed the rating of an external electrolytic input capacitor.
The recommended external input capacitance is specified in the
Input Characteristics section on the Electrical Specifications page.
More detailed information is available in the application note
titled “EMI Characteristics” on the SynQor website.
Output Filtering and External Output Capacitance:
Figure D below shows the internal output filter components. This
filter dramatically reduces output voltage ripple. However, some
minimum external output capacitance is required, as specified in
the Output Characteristics section on the Electrical Specifications
page. No damage will occur without this capacitor connected,
but peak output voltage ripple will be much higher.
Vin(+)
Vout(+)
Electrolytic
Capacitor
Vsense(+)
External
Vin
Input
ON/OFF
Trim
R_trim-up
or
Filter
Vsense(^_)
R_trim-down C_load
I_load
Vin(^_)
Vout(^_)
Figure C: Typical application circuit (negative logic unit, permanently enabled).
Vin(+)
C₁
Vin(^_)
L_in
C₂
Regulation
Stage
Current
Sense
Isolation
Stage
Vout(+)
Vout(^_)
Figure D: Internal Input and Output Filter Diagram (component values listed on specifications page).
Product # IQ24500HZx10
Phone [phone]
www.synqor.com
Doc.# 005-HZC2450 Rev. D 06/16/09
Page 10