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| TEA1795T Datasheet, PDF (7/14 Pages) NXP Semiconductors – GreenChip synchronous rectifier controller | |||
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NXP Semiconductors
TEA1795T
GreenChip synchronous rectifier controller
10. Characteristics
Table 5. Characteristics
Tamb = 25 °C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol Parameter
Conditions
Min Typ Max Unit
Supply voltage management (pin VCC)
Vstartup
start-up voltage
Vhys
hysteresis voltage
ICC(oper) operating supply current
VCC = 8 V (VCC < Vstartup)
fsw = 200 kHz;
no load on pins GDA and GDB
8.2 8.5 8.8 V
[1]
-
0.5 -
V
-
0.35 -
mA
-
1.85 -
mA
Synchronous rectification sense input (pins DSA/SSA and pins DSB/SSB)
Vact(drv)
Vreg(drv)
Vdeact(drv)
VI(cm)
td(act)(drv)
td(deact)(drv)
tact(sr)(min)
driver activation voltage
Vsense(S)A = 0 V; Vsense(S)B = 0 V
driver regulation voltage
Vsense(S)A = 0 V; Vsense(S)B = 0 V
driver deactivation voltage Vsense(S)A = 0 V; Vsense(S)B = 0 V
[2]
common-mode input voltage pins SSA and SSB
driver activation delay time
driver deactivation delay
time
minimum synchronous
rectification active time
Vsense(S)A = 0 V; Vsense(S)B = 0 V;
Vsense(D)A = falling from +0.5 V to â0.5 V;
Vsense(D)B = falling from +0.5 V to â0.5 V
Vsense(S)A = 0 V; Vsense(S)B = 0 V;
Vsense(D)A = rising from â0.35 V to +0.5 V;
Vsense(D)B = rising from â0.35 V to +0.5 V
â260 â220 â180 mV
â33 â25 â17 mV
-
â12 -
mV
â0.7 -
+0.7 V
-
100 -
ns
-
35 -
ns
415 520 625 ns
toff(sr)(min) minimum synchronous
rectification off-time
310 400 490 ns
Gate driver (pins GDA/GDB)
Isource
source current
VCC = 15 V; pins GDA/GDB = 2 V; during
minimum synchronous rectification active
time
â0.46 â0.4 â0.34 A
VCC = 15 V; pins GDA/GDB = 5 V;
minimum synchronous rectification active
time has ended
-
â4 -
mA
Isink
sink current
VCC = 15 V
pins GDA/GDB = 2 V
1
1.4 -
A
pins GDA/GDB = 9.5 V
2.2 2.7 -
A
Vo(max)
maximum output voltage
Switching
VCC = 15 V
-
10
12
V
fsw(max)
maximum switching
frequency
500 -
-
kHz
[1] The VCC stop voltage is Vstartup â Vhys.
[2] The Vdeact(drv) level is always above the Vreg(drv) level.
TEA1795T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 â 4 November 2010
© NXP B.V. 2010. All rights reserved.
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