NCV7429 datasheet(9/43 Pages) ONSEMI

Part #	NCV7429

Description	System Basis Chip

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NCV7429

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9

Table 5. ELECTRICAL CHARACTERISTICS (continued)

(6 V

≤ Vs ≤ 18 V, 6 V ≤ Vs_out ≤ 18 V, −40°C ≤ Tj ≤ 150°C; unless otherwise specified)

Symbol

Unit

Max

Typ

Min

Conditions

Parameter

MODE TRANSITION TIMING

Tdel_powerup

Transition Time from Power-up to

Init

VS reaching VS_PORH to VR1

startup

15

ms

Tdel_norm_stdby

Transition Time from Normal/Flash

to Standby Mode via SPI

CSN going high to Standby mode

entry (Note 9)

10

ms

Tdel_norm_sleep

Transition Time from Normal/Flash

to Sleep Mode via SPI

CSN going high to Sleep mode

entry (Note 9)

10

ms

Tdel_stdby_norm

Delay of INTN Pulse in Standby af-

ter Wakeup

10

ms

Tdel_sleep_init

Transition from Sleep to Init Mode

via Wakeup

10

ms

NRES AND INTN SIGNAL TIMING

T_NRES

NRES Low Pulse Duration,

e.g. after a Watchdog Failure or

VR1 Undervoltage

1.7

2

2.3

ms

T_INTN

INTN Low Pulse Duration

after Wake-up Event

106

125

144

ms

DRIVER TIMING

Tdel_OUT1−3_on

Activation Delay of OUT1−3 Driver

(from CSN rising edge)

VS_OUT = 13.2 V;

V(OUT1−3) > 0.5·VS_OUT

12

40

ms

Tdel_OUT1−3_off

De-activation Delay of OUT1−3

Driver (from CSN rising edge)

VS_OUT = 13.2 V;

V(OUT1−3) < 0.5·VS_OUT

20

55

ms

Tdel_LS1/2_on

Activation Delay of LS1/2 Driver

(from CSN rising edge)

VS_OUT = 13.2 V;

V(LS1/2) < 0.5·VS_OUT

17

42

85

ms

Tdel_LS1/2_off

De-activation Delay of LS1/2 Driver

(from CSN rising edge)

VS_OUT = 13.2 V;

V(LS1/2) > 0.5·VS_OUT

17

32

62

ms

INTERNAL PWM FOR DRIVERS CONTROL

f_PWM_lo

PWM Controller Frequency,

Low Setting

FSEL_OUTx/LSx = 0

127

150

173

Hz

f_PWM_hi

PWM Controller Frequency,

High Setting

FSEL_OUTx/LSx = 1

170

200

230

Hz

TIMER1/2 TIMING

Ttim_acc

Timer1/2 Period/On-time Accuracy

(see CONTROL_2 register settings)

T1_TPER.[2:0], T1_TON,

T2_TPER.[2:0], T2_TON.[1:0]

−15

+15

%

9. Delays and slopes of LS1/2 drivers not included.

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