AS1860

Akros Silicon, Inc.

6399 San Ignacio Avenue, Suite 250, San Jose, CA 95119 USA

408.746.9000



http://www.AkrosSilicon.com

13

Table 7 - Primary Side DC-DC Controller Electrical Characteristics

Symbol

Parameter

Min

Max

Unit

Conditions

VIN_AF

Type 1 PD input voltage

37

48

57

V

Measured at the Network Interface

VIN_AT

Type 2 PD input voltage

42.5

48

57

V

Measured at the Network Interface

VAUX

Input Voltage, Local Power

Mode

9.5

57

V

Measured at 48VIN (referenced to

48N) over full VLDET range

VLDET_ON

Local input voltage threshold

for Local Power Mode - ON

48VIN

-2.4V

V

See Table 3 for Absolute Maximum

Rating for LDET (referenced to

48VIN).

VLDET_OFF

Local input voltage threshold

for Local Power Mode - OFF

48VIN-

1.2V

V

VBIAS

External bias source voltage

V

Sets VOH of GATE.

FPWM1L

Low end of Primary PWM

switching frequency range

104

KHz

Set by external resistors on PRI_DIV

and SEC_DIV pins see Table 17.

FPWM1H

High end of Primary PWM

switching frequency range

512

KHz

Set by external resistors on PRI_DIV

and SEC_DIV pins see Table 17.

FOSC1

PWM1 clock frequency

accuracy

-20

+20

%

See Table 17 for frequency.

FPWM1T

PWM switching frequency

temperature coefficient

0.12

%/C°

Refer to Table 17 for PWM Frequency.

RH_GATE

GATE drive impedance

6

Ω

High side output drive resistance,

Source.

RL_GATE

6

Ω

Low side output drive resistance, Sink.

VPK1P

Peak current sense

threshold voltage at

ISENSEP

395

mV

Ipeak = VPK1P / RISENSEP.

DMAX1

Primary PWM Maximum

duty cycle

%

DMIN1

Primary PWM Minimum duty

cycle

%

1

Typical values at: Ta = 25°C, Vin = 48VDC. Typical specifications not 100% tested. Performance guaranteed by design and/or other correlation

methods.

Table 8 - Secondary Side Sync Controller (Output #1) Electrical Characteristics

Symbol

Parameter

Min

Max

Unit

Conditions

VSYNC_OUT

SYNC_OUT voltage

4.5

5

6

V

RH_SYNC

SYNC_OUT

Source Impedance

VDD_SYNC = 5V

2.5

Ω

Source

RL_SYNC

2.5

Ω

Sink

VMR1

Output 1 voltage margining

range

±5

%

Software mode, see Table 37.

VREF1

FB1 voltage reference

0.98

1.0

1.02

V

ILEA1

Error amp leakage

µA

Gm1

Feedback Transconductance

(Siemens)

150

225

350

µS

1

Typical values at: Ta = 25°C, Vin = 48VDC. Typical specifications not 100% tested. Performance guaranteed by design and/or other correlation

methods.

2

Guaranteed by design. Not tested in production.