Fujitsu MB3887 oscillationwaveTriangular kHzffrequencyOSC, thresholdamplifierError VVvoltageTH

MB3887

Triangular wave oscillation frequency

vs. Timing resistor

Triangular wave oscillation frequency

vs. Power supply voltage

Triangular wave oscillation frequency fOSC (Hz)

1 M

100 k

10 k

10

Ta = +25 °C

VCC = 19 V

CTL = 5 V

1001000

Triangular wave oscillation frequency fOSC (kHz)

340

330

320

310

300

290

280

270

260

Ta = +25 °C

CTL = 5 V

RT = 47 kΩ

0 5 10 15 20 25

			Timing resistor RT (kΩ)
		Triangular wave oscillation frequency
			vs. Ambient temperature
	320
	315					VCC = 19 V
oscillationwaveTriangular (kHz)ffrequencyOSC	310					CTL = 5 V
						RT = 47 kΩ
	305
	300
	295
	290
	285
	280
	275
	270
	265
	260
	−40	−20	0	20	40	60 80 100

		Power supply voltage VCC (V)
		Error amplifier threshold voltage
		vs. Ambient temperature
	4.25
	2.24						VCC = 19 V
thresholdamplifierError (V)VvoltageTH							CTL = 5 V
	4.16
	4.23
	2.22
	4.21
	4.20
	4.19
	4.18
	4.17
	4.15−
		40 −20	0	20	40	60		80 100

Ambient temperature Ta ( °C)	Ambient temperature Ta (	°
		C)

(Continued)

13