19-6179; Rev 0; 1/12
E V A L U A T I O N K I T A V A I L A B L E
MAX17598/MAX17599
Low I , Wide-Input Range, Active Clamp
Q
Current-Mode PWM Controllers
General Description
Benefits and Features
The MAX17598/MAX17599 low I , active clamp current-
Q
S Active Clamp, Peak Current-Mode Forward PWM
mode PWM controllers contain all the control circuitry
required for the design of wide-input isolated/non-iso-
lated forward-converter industrial power supplies. The
MAX17598 is well-suited for universal input (rectified 85V
AC to 265V AC) or telecom (36V DC to 72V DC) power
supplies. The MAX17599 is optimized for low-voltage
industrial supplies (4.5V DC to 36V DC).
Controller
S 20FA Startup Current in UVLO
S 4.5V to 36V Input-Supply Operating Range
(MAX17599)
S Programmable Input Undervoltage Lockout
S Programmable Input Overvoltage Protection
The devices include an AUX driver that drives an aux-
iliary MOSFET (clamp switch) that helps implement the
active-clamp transformer reset topology for forward con-
verters. Such a reset topology has several advantages
including reduced voltage stress on the switches, trans-
former size reduction due to larger allowable flux swing,
and improved efficiency due to elimination of dissipative
snubber circuitry. Programmable dead time between the
AUX and main driver allows for zero voltage switching (ZVS).
S Programmable 100kHz to 1MHz Switching
Frequency
S Switching Frequency Synchronization
S Programmable Frequency Dithering for Low EMI
Spread-Spectrum Operation
S Programmable Dead Time
S Adjustable Soft-Start
S Programmable Slope Compensation
The switching frequency is programmable from 100kHz
to 1MHz for the devices with an accuracy of Q5% using
an external resistor. This allows the optimization of the
magnetic and filter components, resulting in compact,
cost-effective isolated/nonisolated power supplies. For
EMI-sensitive design, the ICs incorporate a program-
mable frequency dithering feature and enables low EMI
spread-spectrum operation.
S Fast Cycle-by-Cycle Peak-Current-Limit 40ns
Typical Propagation Delay
S 70ns Internal Leading-Edge Current-Sense
Blanking
S Hiccup Mode Output Short-Circuit Protection
S Soft-Stop for Well-Controlled Clamp Capacitor
Discharge
An input undervoltage lockout (EN/UVLO) is provided
for programming the input-supply start voltage, and to
ensure proper operation during brownout conditions. The
EN/UVLO input is also used to turn on/off the ICs. Input
overvoltage (OVI) protection scheme is provided to make
sure that the regulator shuts down when the input supply
exceeds its maximum allowed value.
S Negative Current Limit to Limit Clamp-Switch
Clamp Capacitor and Transformer Reverse Current
S 3mm x 3mm, Lead-Free 16-Pin TQFN
Applications
Telecom and Datacom Power Supplies
Isolated Battery Chargers
To control inrush current, the devices incorporate an SS
pin to set the soft-start time for the regulator. Power dis-
sipation under fault conditions is minimized by a hiccup
overcurrent protection (hiccup mode). A soft-stop feature
provides safe discharging of the clamp capacitor when the
device is turned off, and allows the controller to restart in a
well-controlled manner. Additionally, a negative current limit
is provided in the current-sense circuitry, helping limit the
clamp switch current under dynamic operating conditions.
Servers and Embedded Computing
Industrial Power Supplies
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX17598.related.
A SYNC feature is provided to synchronize multiple convert-
ers to a common external clock in noise-sensitive applica-
tions. Overtemperature faults trigger a thermal shutdown for
reliable protection of the device. The ICs are available in a
16-pin, TQFN package with 0.5 mm lead spacing.
����������������������������������������������������������������� Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
5秒后页面跳转
解析光耦仿真器：升级光耦合器技术的必要性
英伟达新一代Blackwell GPU过热问题致交付延迟
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
