NCV78514

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5

Table 4. THERMAL INFORMATION (Note 4)

Symbol

Parameter Description

Min

Typ

Max

Unit

Notes

RTHETA_JC

Junction to exposed pad thermal resistance

3.2

C/W

4. Includes also typical solder thickness under the Exposed Pad (EP).

ELECTRICAL CHARACTERISTICS

In the electrical table of this section, the Min and Max

Limits apply for ambient temperature from −40C to 125C

and junction temperature from −40C to +150C and for

VBAT from 5 V to 21 V unless otherwise specified. Typical

values are referenced to TJ = + 25C, VBAT = 14.0 V.

Table 5. BAT ELECTRICAL CHARACTERISTIC TABLE

Symbol

Parameter Description

Min

Typ

Max

Unit

Notes

P_UVLO_starting

Under−voltage comparator rising edge – BAT rising

7.75

8

8.25

V

P_UVLO_operating Under−voltage comparator falling edge – BAT falling

5

V

P_OVLO_operating Over−voltage comparator BAT rising edge

20

21

V

P_OVLO_starting

Over−voltage comparator BAT falling edge

18

19

V

P_OVLO_hyst

Over−voltage hysteresis, falling

1.5

2.3

V

P_OVLO_FALL

BAT falling for rearming after an overvoltage

20

ms

P_BAT_IWAIT

BAT pin Wait current, UVLO <BAT< OVLO no switching

DIM=0 or FAULT/STOP modes

8

mA

Table 6. POWER TREE TABLE

Symbol

Parameter Description

Min

Typ

Max

Unit

Notes

P_VDD

LDO supply voltage, BAT > P_UVLO_operating

3.3

V

(Note 5)

P_VDD_CLAMP

VDD Current limit, BAT > P_UVLO_operating

30

55

mA

P_CVDD

VDD output capacitance, including derating

2.2

4.7

mF

P_VDRV

VDRV supply voltage, BAT > P_UVLO_operating

5

V

(Note 5)

P_VDRV_CLAMP

VDRV Current limit, BAT > P_UVLO_operating

40

60

mA

P_CVDRV

VDRV output capacitance, including derating

2.2

4.7

mF

P_PORB_R

Power on reset threshold, VDD rising

2.95

V

P_PORB_F

Power on reset threshold, VDD falling

2.5

V

5. Loaded up to the minimum clamp value

Table 7. DC−DC CONVERTER TABLE

Symbol

Parameter Description

Min

Typ

Max

Unit

Notes

P_HSS_RON

High side switch resistance from BAT to SW

75

mW

P_LSS_RON

Low side switch resistance from SW to PGND

260

mW

P_IPEAK

IPEAK protection of the inductor

4.5

A

P_EFFICIENCY1

DC to DC efficiency, buck mode, BAT 14 V,

VLED 9 V, 1.5 A

90

%

P_EFFICIENCY2

DC to DC efficiency, boost mode, BAT 14 V,

VLED 44 V, 0.4 A

90

%

P_EFFICIENCY3

DC to DC efficiency, buck−boost mode, BAT14 V,

VLED 13 V, 1 A

90

%

P_DC_Buck_Max

Max duty cycle in Buck Mode (BAT > VLED),

from Buck to Buck−Boost

80

%

P_DC_Boost_Min

Min duty cycle in Boost Mode (BAT < VLED),

from Boost to Buck−Boost

23

%