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参数资料
| 型号： | MAX5069EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/19页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX5069 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，隔离 |
| 输出电压： | 12V |
| 电流 - 输出： | 10A |
| 输入电压： | 36 ~ 72V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX5069 |
High-Frequency, Current-Mode PWM Controller
with Accurate Oscillator and Dual FET Drivers
ELECTRICAL CHARACTERISTICS (continued)
(V IN = +12V for the MAX5069C/D, V IN = +23.6V for the MAX5069A/B at startup, then reduces to +12V, C IN = C REG5 = 0.1μF,
C VCC = 1μF, R RT = 100k ? , NDRV_ = floating, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER
NDRV_ Switching Frequency
RT Voltage
Oscillator Accuracy
Maximum Duty Cycle
SYMBOL
f SW
V RT
D MAX
CONDITIONS
f SW = 10 11 / (2 x R RT )
40k ? < R RT < 500k ?
f OSC ≤ 500kHz
T A = +25 ° C
f OSC > 500kHz
f OSC ≤ 500kHz
T A = -40 ° C to +125 ° C
f OSC > 500kHz
DT connected to REG5
MIN
25
-2.5
-4
-4.5
-6
TYP
2.0
100
MAX
1250
+2.5
+4
+4.5
+6
UNITS
kHz
V
%
%
DEAD-TIME CONTROL (DT)
Dead Time
Dead-Time Disable Voltage
Dead-Time Regulation Voltage
t DT
V DT_DISABLE
V DT
R DT = 24.9k ?
V REG5 -
0.5V
60
1.23
ns
V
V
INTEGRATING FAULT PROTECTION (FLTINT)
FLTINT Source Current
FLTINT Shutdown Threshold
FLTINT Restart Threshold
I FLTINT
V FLTINT_SD
V FLTINT_RS
V FLTINT = 0V
V FLTINT rising
V FLTINT falling
60
2.8
1.6
μA
V
V
SLOPE COMPENSATION
Slope Compensation
Slope-Compensation Range
Slope-Compensation Voltage
Range
V SLOPE
V SLOPER
V SCOMP
C SLOPE = 100pf, RT = 110k ?
0
0
15
90
2.7
mV/μs
mV/μs
V
Note 1: The MAX5069 is 100% tested at T A = +25°C. All limits over temperature are guaranteed by design.
Note 2: The MAX5069A/B are intended for use in universal-input power supplies. The internal clamp circuit is used to prevent the
bootstrap capacitor (C1 in Figure 1) from charging to a voltage beyond the absolute maximum rating of the device when
UVLO/EN is low. The maximum current to V IN (hence to clamp) when UVLO is low (device is in shutdown) must be external-
ly limited to 2mA. Clamp currents higher than 2mA may result in clamp voltages higher than 30V, thus exceeding the
absolute maximum rating for V IN . For the MAX5069C/D, do not exceed the 24V maximum operating voltage of the device.
Note 3: Reference voltage (V REF ) is measured with FB connected to COMP (see the Functional Diagram ).
Note 4: The SYNC frequency must be at least 25% higher than the programmed oscillator frequency.
Note 5: The internal oscillator clock cycle.
4
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