MAX5941ACSE(2003) データシートの表示（PDF） - Maxim Integrated

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MAX5941ACSE
(Rev.:2003)

IEEE 802.3af-Compliant Power-Over-Ethernet Interface/PWM Controller for Power Devices

Maxim Integrated 

IEEE 802.3af-Compliant Power-Over-Ethernet

Interface/PWM Controller for Power Devices

ELECTRICAL CHARACTERISTICS (PWM Controller) (continued)

(All voltages referenced to V-. VDD = 13V, a 10µF capacitor connects VCC to V-, VCS = V-, V+ = 48V, 0.1µF capacitor connected to

SS_SHDN, NDRV = open circuit, OPTO = V-, TA = TMIN to +TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

V+ Shutdown Current

VDD Shutdown Current

PREREGULATORS/STARTUP

V+ Input Voltage

VDD Supply Voltage

INTERNAL REGULATORS

VCC Output Voltage

VCC Undervoltage Lockout

OUTPUT DRIVER

Peak Source Current

Peak Sink Current

NDRV High-Side Driver

Resistance

SYMBOL

CONDITIONS

VSS_SHDN = 0V, V+ = 67V

VSS_SHDN = 0V

VCC_UVLO

Powered from V+, ICC = 7.5mA, VDD = 0V

Powered from VDD, ICC = 7.5mA

VCC falling

ROH

VCC = 11V (externally forced)

VCC = 11V (externally forced)

VCC = 11V, externally forced, NDRV

sourcing 50mA

MIN TYP MAX UNITS

190 290

µA

8

20

µA

18

67

V

13

36

V

7.5

9.8

12

V

9.0 10.0 11.0

6.6

V

570

mA

1000

mA

4

12

Ω

NDRV Low-Side Driver

Resistance

PWM COMPARATOR

OPTO Input Bias Current

OPTO Control Range

Slope Compensation

THERMAL SHUTDOWN

Thermal Shutdown Temperature

Thermal Hysteresis

CURRENT LIMIT

CS Threshold Voltage

CS Input Bias Current

Current-Limit Comparator

Propagation Delay

ROL

VCC = 11V, externally forced, NDRV sinking

50mA

VOPTO = VSS_SHDN

VSCOMP MAX5941A

-1.00

2

VILIM VOPTO = 4V

419

0V ≤ VCS ≤ 2V, VOPTO = 4V

-1

25mV overdrive on CS, VOPTO = 4V

1.6

4

Ω

+1.00

µA

3

V

26

mV/µs

150

°C

25

°C

465 510

mV

+1

µA

180

ns

CS Blanking Time

OSCILLATOR

Clock Frequency Range

Max Duty Cycle

SOFT-START

SS Source Current

SS Sink Current

Peak Soft-Start Voltage Clamp

Shutdown Threshold

VOPTO = 4V

VOPTO = 4V

MAX5941A, VOPTO = 4V

MAX5941B, VOPTO = 4V

ISSO

VSS(SHDN) = 0V

No external load

VSS_SHDN falling (Note 11)

VSS_SHDN rising (Note 11)

70

ns

235

275

314

kHz

75

85

%

44

50

2.0

4.6

6.5

µA

1

mA

2.331 2.420 2.500

V

0.25 0.37 0.41

V

0.53 0.59 0.65

4 _______________________________________________________________________________________

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